Vietnamese Volleyball Wins on Emotion, and That Is Exactly the Problem

The sheet had only fourteen lines.

Fourteen names, fourteen numbers. No attack attempts, no attack errors, no times blocked, not a single empty box reserved for reception quality, not a trace of the setter. I flipped it over. Still blank. The tournament statistician looked at me as though I had just asked for the head coach's phone number: "Sir, we only record points here."

I stayed that night until the lights in the gym went out. That fourteen-line sheet, added together, is the entire public memory of an elite Vietnamese volleyball match. It records who finished the rally. It does not record why the rally could be finished at all.

The spike ends the rally, but the set is the reason the rally gets told. A clean reception opens up a single block, and from there the setter has two options instead of one. That chain of cause and effect lasts three seconds, and inside those three seconds there are at least four data points nobody in Vietnam bothers to write down. The scoresheet is not wrong. It is simply telling a different story.

When the whole city argues about xG, I print out the spreadsheet and draw a heart on it. I realised I had grown used to that in football: there is data, therefore there is debate, therefore emotion can be placed on top of something countable. In Vietnamese volleyball, that foundation does not exist. We are arguing on air.

All season long I carried a small notebook to every match in the national championship. Not for anything grand, just to count the things the scoresheet throws away. What I found was not a bad player, and not a coach who got it wrong. What I found was an entire system operating on collective memory, and collective memory always favours whoever scored last.

The country has just come through one of the most successful cycles in the history of Vietnamese volleyball. The women's team won the AVC Challenge Cup 2026 in Manila for the first time, then went all the way to the final of the FIVB Challenger Cup the same year, where they were stopped by the Czech Republic. That is the deepest run any Vietnamese volleyball team has ever made on the world stage. Trần Thị Thanh Thúy went to Japan and wore the PFU Blue Cats jersey in the V.League, opening a door nobody in Vietnamese women's volleyball had opened before. Nguyễn Thị Bích Tuyền became one of the most feared opposite hitters in the region. Gyms filled to the rafters, livestreams drew hundreds of thousands of viewers, fan pages sprouted like mushrooms after rain.

The results came, the emotion came, the money began to come. The data did not.

From here on, I will call Vietnam's volleyball problem by its real name: we have a volleyball culture that tells stories extremely well and keeps records extremely badly, and it is the second weakness that is capping the first.

I am not saying this to belittle anyone. I am saying it because it is time to say it, before this successful cycle closes and we sit together in an empty room, wondering why a golden generation passed through without leaving behind a single usable file.

Points are not efficiency

Let's start with the number everyone knows by heart.

In one match, the main hitter of Team A scores 20 points. The scoresheet says 20. The next day's headlines call it a star performance. But to get those 20 points she took 55 swings, made 9 attack errors into the net or out of bounds, and was blocked dead 4 times. Her real number is: (20 − 9 − 4) divided by 55, which is 12.7 percent efficiency. Twelve point seven percent. That is a bad match, dressed up by twenty rounds of applause.

Across the net, Team B's second hitter scored 14 points. Six fewer. But she needed only 30 swings, made 3 errors, and was blocked once: (14 − 3 − 1) divided by 30, which is 33.3 percent efficiency. Nearly three times the player who was called the star. The scoresheet does not say that, because the scoresheet has no denominator.

This is the most fundamental difference between a number you count and a number you understand. Points are an absolute figure with no denominator, so they always reward whoever is fed the most balls. Attack efficiency is a relative figure with a denominator, so it rewards whoever converts opportunity into value. In every elite sport, people gradually move from absolute numbers to relative numbers, because absolute numbers measure opportunity rather than ability.

Vietnam's problem is not a shortage of absolute numbers. We have points, standings, win counts. The problem is that we stopped there, and we stopped there long enough for an entire generation of coaches, journalists and fans to believe that the player with the most points is the best player. That belief is not entirely wrong. It is just not right.

I fell into exactly this trap at sixteen, when I posted a piece on Facebook with a hand-drawn spreadsheet and got buried by the internet. The post was about the xG of Vietnam's U23 team in Changzhou. It got 1,243 shares, most of them furious comments. But I learned the formula: one contrarian claim plus three concrete numbers equals reach. That formula has not changed in nine years. Only the subject has changed. Today I am applying it to volleyball, and I know in advance that stones will be thrown, because I am touching the one thing the whole sport is proud of: instinct.

Instinct is a gift. But a coach's instinct is only worth as many matches as he can remember. A scout's instinct is only worth as many sessions as he can sit through. And in a league with twelve teams playing a double round robin, that instinct expires exactly when the market starts demanding an answer.

Reception: the biggest blank in every notebook

There is one metric that, if erased from world volleyball, would send the top national teams into crisis within a week: the perfect-pass rate.

The standard FIVB system grades a reception on four levels. A three-pass goes exactly to the setter's spot, and he can run every play in the book. A two-pass still reaches the setter but outside the ideal zone, costing him a third of his options. A one-pass has to be dug with the whole body and forces the setter to move out to the wing. A zero is a reception error. The perfect-pass rate is the number of three-passes divided by total receptions; the positive-pass rate is three-passes plus two-passes divided by total receptions.

Vietnam publishes this metric for almost no domestic match.

The consequence does not stop at missing a number. It extends into how we assign blame. When an attack breaks down, the fan's reflex is to blame the setter: too slow, too low, straight into a double block. But if the ball was a one-pass, the setter is sprinting from the three-metre line to the sideline, and in that situation he has exactly one option left: throw it to the left wing, where a double block was already built before he touched the ball. The fault belongs to the reception. But the reception has no place on that fourteen-line sheet.

Based on my own experience watching matches in different gyms, a team with a positive-pass rate around 62 percent can run middle attacks at roughly 20 to 24 percent of total plays. Drop that to 48 percent, and the middle attack falls below ten percent, and the setter is essentially surviving on wing balls. A fourteen-point gap in reception sounds small. It is equivalent to losing nearly half of a team's attacking system.

The difficulty in Vietnamese volleyball is that reception depends heavily on technical foundations, and technical foundations produce no highlights. Nobody makes a thirty-second clip of a three-pass. Nobody sponsors a libero. So in a culture where value is measured in views, the person doing the most important job on the court is the person least recorded.

Nguyễn Khánh Đang, libero of the Vietnam women's national team, is the archetype of the player data would elevate and media forgets. If her perfect-pass rate were published after every round, I believe we would get the first genuine public debate in the history of Vietnamese volleyball about who the team's second-most important player is, and why everyone assumes it must be a hitter.

Blocking: counting what you see, ignoring what decides

In blocking, Vietnamese volleyball has progressed slightly. We have "successful blocks", usually per set in international events, and occasionally repeated by media when discussing a middle blocker.

But that number ignores the hardest part of the craft: block touches.

A middle blocker who stuffs three balls across five sets has a beautiful number. Another middle blocker stuffs only one, but touches the ball six times, slowing it enough for the libero behind to read the direction and dig it up. The second player has created five counter-attack opportunities that the scoresheet never records. In modern volleyball, the block system and the defence system are inseparable. The blocker's job is to build a wall with a hole in it, and the defender's job is to stand in the hole. If nobody records touches, nobody measures the quality of the wall, and nobody measures the accuracy of the person standing behind it.

The second consequence of counting only successful blocks is that it rewards caution. A middle blocker who wants a pretty number only has to stand still, time the jump, and collect a few stuffs. A middle blocker who wants to help the team win has to move laterally with the opposing setter, read the play, and accept the risk of being hit through the seam. The second player usually has a lower successful-block count. And in a volleyball culture where contracts, awards and national-team call-ups are decided by successful blocks, we are teaching young middles that safety is the shortest path to recognition.

I have watched enough matches to believe Vietnamese blocking is misjudged in two directions at once. Middles with many stuffs are over-praised, because the number is easy to see. Middles who make the defensive system function are under-rated, because their work happens in silence. Both mistakes come from the same root: we measure the outcome, not the process.

Serving: aces are glory, errors are silence

This is where I want to be most blunt in this entire piece, because it touches a media habit that has sunk deep into all of our instincts.

When a player serves a direct point, we call it an ace, we cut a clip, we count it, we praise it. When that player serves the ball out, we say nothing. Over a five-set match, a big jumper server might have 5 aces and 14 service errors. Her net is minus nine. Never mind that those fourteen service errors are fourteen rallies handed straight to the opponent, who needs no contest, no spike, just a place to stand and watch.

In Japan, Korea or Türkiye, there is a metric called the ace-to-error ratio, or more broadly the service differential. It exists because coaches understand something simple: in volleyball, serving is the only action you fully control, and therefore the only action with which you can kill yourself. A server with a negative differential is giving points away, no matter how pretty the ace count looks.

But the story goes deeper, and this is where even the official statistics have a hole.

The real goal of the modern serve is not an ace. It is to drag the opponent's reception down to a one or a two, forcing them out of system, so that your block and defence have work to do. A serve that wins no point directly but forces the opposing libero to dig with a twisted forearm is worth nearly half an ace, and that value is recorded nowhere. In the FIVB system, only aces and errors are logged. To measure "service pressure" you need a human being watching the tape and grading every serve. In Vietnam, nobody does that systematically.

Here I want to name a reality the professionals know but rarely say out loud: a volleyball culture without serving data will never fix its serving errors, because serving errors are the only errors nobody remembers. When a reception fails, fans remember the libero's face. When a spike fails, fans remember the hitter's face. When a serve fails, fans remember one word: shame.

Rotations: where points bleed

There is a concept I consider the next frontier of volleyball analysis, and also the most alien to Vietnamese fans: rotation analysis.

Volleyball has six rotations, and each one is a completely different strategic situation. Same team, same people, but in rotation one the setter is in the front row, while in rotation four the setter is in the front row with a different trio around him. Analysts track points won minus points lost per rotation across a season, and from that they see where a team is bleeding. Volleyball is the only sport where the team structure changes six times per set under a mandatory rule, and if you do not measure that structure, every tactical analysis is just guesswork.

I did this myself for three teams in the national championship last season, rewatching footage and tagging every rally by rotation. The result surprised me in an uncomfortable way. All three teams shared the same weak point: the rotation where the setter stands at position four, meaning the front row holds the setter, a middle blocker and a wing hitter, while the back row lacks a dedicated defender. In that rotation, they lost points on net. Not one or two points across a match, but a net loss in almost every match.

What is telling is that when I brought this number to people in the game, the common reply was: "Well, everyone knows that." Everyone knows that. But nobody has a table to prove it, so nobody has grounds to change personnel, change the serving rhythm, change the substitution pattern. In volleyball there are three ways to handle a weak rotation: substitute at the right moment, serve at the opponent's weak receiver to stretch that phase, or accept the rotation and compensate elsewhere. All three are tactical decisions. All three need a number.

Vietnamese volleyball currently solves this problem with a stock phrase: "Today was just dark." Those four words have replaced a spreadsheet.

I do not think Vietnamese coaches fail to understand this. I think they understand it perfectly, but they work in an environment where the only recorder on court is the point-keeper. Give them the right tool and they will use it. The problem is that nobody has handed it over.

A market with no price

So far, all of this could be read as an academic story. But when data is missing, the thing that suffers immediately is not academia. It is money.

Trần Thị Thanh Thúy going to Japan is a milestone, and I believe it will be referenced for the next decade. A Vietnamese player holding her own inside Japan's V.League, where clubs have their own analytics departments and every player is assessed through video-tracked data point by point, is a leap in class. But think about what took her there.

Not a Vietnamese spreadsheet. No such spreadsheet exists. What took her there was footage from international events, the eyes of people inside the game, a handful of relationships built over years, and above all the matches where she performed in front of foreign opponents. That is a legitimate path. But it is a path that cannot be replicated, because it depends on conditions that cannot be copied: an international tournament that the national team is invited to, a player who is visibly a cut above the rest, and an agent good enough to sell that story abroad.

Now imagine another hitter, good but not so outstanding that the whole region takes notice. She has no spreadsheet proving her 38 percent attack efficiency over three seasons. She has no perfect-pass rate proving she can cover three consecutive rotations. She has no block touches proving she is more than a body under the net. In a negotiation, she has only her own word and someone else's belief in that word. In every labour market on earth, an inability to prove value leads to one result: the person who owns the value receives less than the value they create.

I have followed how Vietnamese clubs buy and sell players for years, and what bothers me most is not low prices. What bothers me most is that prices do not exist.

This is where I have to address a structure that is quietly harming small clubs: the loan with an obligation to buy. In its most common form, a small club takes on a young player from a big club or an academy, pays the wages and does the coaching, and the clause states that if the player reaches a certain number of appearances, the small club must buy them outright at a price fixed in advance. On paper it looks like a sensible lending mechanism. Look at the risk.

The small club pays wages, housing, recovery costs, puts the player in the lineup, gives her playing time, absorbs defeats because she is still raw. If she improves, the small club must buy at the fixed price, while her true market value has jumped. If she does not improve, the small club must still buy, because the obligation triggered on appearances. The small club carries all the downside and a sliver of the upside. In essence, they are positioned to raise semi-finished goods for the giants, except they receive no matching dividend.

Without public data, the obligation to buy is the only thing that makes these deals workable. Because with public data, people could compare the fixed price against the market price. A number on a spreadsheet is a shield for the weak club. The absence of that number makes them permanently price-takers.

This is where I state my position plainly: loans with an obligation to buy are wrecking the financial planning of small clubs, and the only way they can defend themselves is to build a dataset that can be published, cross-checked, and used as evidence in every negotiation. Data is not just a tool for coaches. Data is the negotiating weapon of the weak.

Contracts, brands and silence

There is a paradox I have met in almost every conversation with players in recent years: Vietnamese sport has more money than ever, and its leading athletes are saying less than ever.

Not because they are boring. Because they have been restructured.

A modern representation contract in Vietnam usually comes with a set of communication guidelines, sometimes just a few lines in an annex, sometimes a full training session. The list of topics to avoid typically includes politics, criticism of the coaching staff, criticism of referees, criticism of the federation, and sometimes simply any opinion that could divide fans. The goal is "brand safety". The result is a generation of athletes speaking in the same voice, with the same vocabulary, none of whom has produced a single memorable line.

In sport, personality is a commodity. An athlete with no personality has no brand; with no brand, no bargaining power; with no bargaining power, total dependence on club and federation. This is a closed loop, and the lock on that loop is silence.

And data is one of the keys that opens it.

An athlete with a public statistical record owns something a contract structure cannot take away: the ability to be judged by results rather than by compliant attitude. If I am a hitter whose attack efficiency sits in the league's leading group for three consecutive seasons, then I can stay silent in public without needing to please anyone to keep my national-team place. The numbers speak for me. And once the numbers speak for me, I have the right to say other things.

Vietnamese volleyball has no such mechanism today. Our athletes have only two public assets: collective achievement and personal image. Collective achievement belongs to the team. Personal image depends on not offending anyone. In a game like that, silence is not a choice. It is a survival condition.

I have followed sports-marketing conversations in Vietnam for a long time, and I see a worrying pattern: brands want to attach themselves to "positivity", "energy", "fighting spirit". Nobody wants to attach themselves to an athlete with an opinion. The safest way to get such an athlete is to force them into being someone with no opinions. We call that professionalism. I call it censorship by contract, and it is impoverishing the sport we love.

People call me a hot-take merchant; I call it a way of seeing that the majority has not yet named. In this case, the unnamed way of seeing is this: the silence of Vietnamese athletes is not a cultural problem. It is a structural problem, and it can be fixed with data.

The most deceptive metric on court

I have held a belief for years, formed first in football: possession is the most deceptive statistic in sport. A team that grinds out 60 percent of the ball with meaningless sideways passes is not controlling the match; they are just holding the ball longer.

In volleyball, the deceptive statistic has another name: attack volume, or, when packaged as a media award, total points scored.

Take a simple example. Team A takes 120 swings in a five-set match and scores 45 points. Team B takes 88 and scores 41. Reading raw numbers alone, Team A dominates. Reading efficiency, Team A hit 37.5 percent, Team B hit 46.6 percent. Team B attacked 32 fewer times and scored nearly as many points, and did so at nearly ten percentage points higher efficiency. In volleyball, the team that attacks less and scores more is the team controlling the match. A team with high volume and low efficiency is usually being forced out of system repeatedly, or digesting its own opportunities.

But here I have to be more careful than in football, because volleyball has its own paradox. High attack volume has more than one cause. It can come from the opponent's poor reception and your repeated transition chances, which is good. It can come from the opponent's strong blocking forcing you to swing again and again within one rally, which is still good if you win those rallies. It can also come from your own poor reception forcing out-of-system attacks, which is bad. One number, three opposite stories.

This is why I strongly oppose using total points as a measure of class. Total points is an aggregate with no context, and in a sport with six rotations, four types of ball above the net, three grades of reception quality and two different blocking systems, a number without context is a number without meaning.

If I had to choose one thing for everyone to memorise before arguing about Vietnamese volleyball online, I would choose attack efficiency. Not because it is perfect. Because it is the only number that forces the speaker to answer the next question.

Where I might be wrong

A piece without a self-critique section is propaganda. I have written enough to know that, and I have been corrected enough to fear it.

The first thing I might be wrong about: volleyball is one of the highest-variance team sports of all. A set is only twenty-five points. A good server can run off eight straight points and turn a match into a fairy tale, and no metric predicts it. In basketball they play 48 minutes and the denominator is large enough for advanced metrics to mean something. In volleyball, a five-set match may contain only 200 rallies. A small denominator means wide confidence intervals, and wide confidence intervals mean I may be building a castle on sand.

I accept that risk, but I must be explicit: every metric I propose here should be read with a sample-size warning. One season is a small sample. Three seasons is where it starts to say something. Ten seasons is where you can compare generations. If someone uses a single match to conclude something about a player, they are doing it wrong, even if they are quoting me.

The second thing I might be wrong about: it is possible the federation and national teams already hold data and simply do not publish it. The FIVB information system is used at international events, and at national-team level, coaches certainly have video and internal notes. If so, my claim that "Vietnam has no data" is too strong. The more accurate claim is: Vietnam has no public data layer. That is a big difference, and it changes the entire recommendation. If the data already exists, the problem is not construction but publication. Publishing is far cheaper than building, but publishing also demands a harder political decision: letting outsiders look in.

The third thing I might be wrong about, and the one I worry over most: emotion is a real competitive resource, and no metric measures it. The Vietnam women's team won the AVC Challenge Cup 2026 in a gym full of Vietnamese fans, with a collective built more on belief than on data. If that successful cycle was built on emotion, then my demand to pour money into statistics may be a way of sabotaging a working success. I have no final answer to this. I only know that emotion can win a tournament, but emotion cannot sustain a system for ten years.

The fourth thing I might be wrong about: priorities. In a sport with limited resources, money is finite. One dong spent on a statistics system is one dong not spent on coaching salaries, sports medicine, youth development, facilities. If I had to choose between an analytics specialist and a physiotherapist for a national team, I would choose the physiotherapist without hesitation. My argument is not that data matters more than everything. My argument is that data is cheaper than people think, and it does not have to be a million-dollar project. It needs one competent person, one camera in a stand corner, and a decision not to hide the numbers.

The fifth, and the one I fear most: data can be weaponised. In football we have seen advanced metrics used to tear down players' reputations, to generate toxic debates, to turn a contextual number into a verdict. Vietnamese volleyball has a fan community full of passion and full of wounds. If I hand that community a spreadsheet without handing over a way of reading it, I may be creating a new bullying tool. I must say this before someone takes my idea and uses it to attack a twenty-year-old girl.

What I am willing to bet

Having made the counter-argument, I still hold my thesis. Not because I am certain. Because I have seen enough to believe.

I have followed Vietnamese volleyball for nine years, from youth-league matches to those Manila nights when the women's team won the continent for the first time. I have seen a volleyball culture move from nobody caring to livestreams with hundreds of thousands of viewers. I have not seen it move from no record-keeping to record-keeping. And I believe the next step, if it comes, will not come from an administrative decision. It will come from a group of outsiders doing it first.

So here is what I am willing to bet, and I am betting with my name on it.

I bet that within the next three seasons, an independent group — not the organisers, not the federation, maybe just three people with a camera and a spreadsheet — will publish perfect-pass rates and attack efficiency for every team in the Vietnamese national championship. Whoever does it will not ask permission, because recording what happens publicly does not require permission. They will be annoying, they will be questioned on method, they will be asked for sources. Then two months later, coaches will quietly open that spreadsheet in the meeting room.

I bet that the first team to win a national title while sitting outside the top three in attack volume, but inside the top two in attack efficiency, will appear before 2030. By then, the argument over which team "played better" will shift from points scored to points per rally, just as football shifted from goals to expected goals over the past decade.

I bet that the sentence "we have no data" will stop being used in Vietnam before this decade ends. Not because the data will be perfect. Because nobody will want to admit they do not have it.

Modrić ran 11.2 kilometres not to score, but to erase the gaps between his teammates. In Vietnamese volleyball, thousands of such gaps are erased every season, and not one of them is counted. The people erasing them are not celebrated. The people finishing the rallies are.

I did not write this to demand a revolution. I wrote it to put a question to the reader: if that fourteen-line sheet is all that remains ten years from now, how will we explain to the generation of players who built this golden cycle that we watched them, that we cried for them, and that we could not be bothered to record a single number beyond the points?

The scoresheet records who won. Only data records why we won. A volleyball culture with nothing but a scoresheet will depend forever on luck knocking on the door again.