Vietnamese Badminton and the Data Gap: The Rhythm Nobody Counts

At noon in August, in a sports hall in Surabaya, a coach called me over after the men's singles semifinal. He handed me the score sheet and asked: “Do you have the average rally length for the kid?” I turned the paper over. 21-17, 19-21, 21-18. Beyond those three lines, nothing else. No rally length, no count of movements toward the left corner, no shuttle speed after the straight smashes. The coach nodded, put the sheet in his pocket, and said something I carried with me for months: “So we don't know what he won with.”

I came to badminton from a running track. At sixteen I was a 400m hurdler at an athletics club in Surabaya, and that sport taught me one thing before it taught me how to run: everything has to be measured. My ankle broke, but the story did not. In a 400m hurdles race I knew the exact time of every 100m segment, the wind reading, the reaction time to the hundredth of a second, and the number of strides between hurdles. When I moved into writing about badminton, the first thing I noticed was that the distance between the two sports lies not in speed or endurance. It lies in the habit of record-keeping.

At world level, badminton is not short of data. In 2026 the Badminton World Federation switched to the 21-point rally scoring system, every rally carries a point, and that turned each exchange into a countable unit. The BWF World Tour splits events into Super 1000, Super 750, Super 500, Super 300 and Super 100 tiers, alongside the season-ending World Tour Finals. From 2026 major events brought in an instant review system, and shuttle speed after a smash is displayed on screen in km/h. Those tournaments generate an enormous volume of data: rally length, net-winner rate, unforced-error counts by court zone, short-serve and long-serve ratios.

Vietnam has enough material to stand inside that current. Nguyen Tien Minh once reached the group of the five strongest men's singles players in the world on the BWF ranking, a mark no Vietnamese player has repeated. Nguyen Thuy Linh appeared at two consecutive Olympic Games, Tokyo 2026 and Paris 2026. Le Duc Phat was also present at Paris 2026. Those are public facts anyone can look up. But once you go down to the domestic and junior circuit, the information floor drops to almost nothing.

I have sat through many sessions at junior events in the country, writing down every rally in a notebook because there was no other data source to cross-check against. Based on my experience following matches, a U17 men's singles match at a national event leaves behind exactly one score sheet and one vertical video shot by a spectator on a phone. A men's singles match in Super 300 qualifying, by contrast, can yield dozens of metrics, from short-and-long serve ratios to successful net approaches and the number of times a player is pushed to the left corner after serving.

What is not measured cannot be taught, and what is not taught will repeat itself as an unconscious habit. That is the direct consequence of the data gap, and it costs far more than any equipment budget. In athletics, a wrong step at the seventh hurdle shows up immediately on the split board, and the coach fixes it the following week. In badminton, a faulty footwork habit formed at fifteen can survive until twenty-five without anyone being able to name it, because nobody recorded it.

The most common counter-argument is money. I do not believe that is the main barrier. A tablet and a free rally-counting app are enough to log the length of every rally in a training session. What is missing is convention: what to record, in what unit, and for what purpose. In many youth academies, coaches measure push-up counts, endurance running minutes, body weight — metrics that are easy to count and easy to report upward. The precision of a footstep in a defensive situation goes unmeasured, because measuring it does not help a team win an age-group title within a season.

That is the blind spot. When youth results are paid for in medals, coaches optimise for what pays them. Fitness advances faster than technique, and a fifteen-year-old can win an age-group title on a better physical foundation than his peers. By nineteen, when those peers have completed their technique, that physical foundation saves no one. At Southeast Asian level, where Vietnamese players regularly face opponents from Indonesia, Malaysia and Thailand, the technical gap becomes clearest in rallies that stretch past ten exchanges.

But if I said that measuring more is always better, I would also be wrong. Data can backfire in another way. Once coaches start measuring everything, physical metrics become the yardstick of success, and the things that cannot be measured — the feel of contact, the tension in the wrist, the breath before a decisive serve — get pushed out of the conversation. Tactics do not live on the whiteboard; they live between two ears. People watch badminton with their eyes; I watch it with my breathing. A spreadsheet cannot replace a coach's ear, nor a player's feel.

The work required is far smaller than people assume. Three metrics are enough to start: average rally length per game, win rate on points when a rally exceeds ten exchanges, and the location where unforced errors originate. Those three take ten minutes to record, with one person and one sheet of squared paper. After a season they draw a line that no training session could produce without them.

The quietest summer is the one that speaks the most. No major tournament, no news cycle, only training sessions and metrics nobody looks at. That is precisely when data is worth the most, because no scoreline is there to obscure it. The stands clap, the players run, and I — a listener — stay behind after the applause dies, writing down the rhythm of rallies nobody counted.

In Indonesia, where I live and work, badminton is the national sport, and the pressure for results is so high that every domestic league match is filmed and reposted. Even there, most of that footage sits still in archives, and nobody strips it into data. The problem is not a shortage of sources, but a shortage of people willing to sit down and read them.

What makes me believe change is possible is not a large project. It comes from a coach deciding to carry a second notebook alongside the score sheet, and filling it patiently session after session. The most durable changes in sport usually begin that way, quietly and with nobody filming.

If the next Vietnamese player comes through qualifying at a Super 1000 event, will we be able to retell how he won — or will we just read out the scoreline and call that a story?