Kim Sang-sik's Race Against Time: How Squad Depth Will Define Vietnam's Asian Cup Dream

In the closed meeting room without windows, I always start with a single question: 'If the match were tomorrow, who is truly ready?' That is the question every coaching staff member must answer before drawing arrows on the tactics board. And that is precisely the question hanging over Vietnam national team head coach Kim Sang-sik, as he has only weeks before the November international window, in the context of the 2026 ASEAN Cup having closed with disappointing results.

I record every phase of play as a witness, not a fan. And what I see from Vietnam's recent journey is not merely a failure, but a structural problem that has long been visible: this team depends too heavily on a small core group, while the next generation lacks the caliber to carry the load when those pillars are absent or out of form. When a team is relegated, I redraw the map of pain. This time, the pain does not come from a specific defeat, but from a punishing schedule and an injury list longer than the list of reliable alternatives.

Context: When the regional tournament is no longer a sufficient benchmark

Vietnam entered the 2026 ASEAN Cup as one of the region's top contenders. But the tournament exposed limitations that the coaching staff had likely seen beforehand: the attack depends on a few individuals, the midfield lacks a tempo-setter when opponents press high, and the defense reveals gaps whenever the team pushes up. Detailed xG or PPDA data was not widely published, so I can only assess based on observation: Vietnam's transitions lack speed, and their ability to retain possession against Southeast Asian opponents who press aggressively has declined noticeably compared to the 2026-2026 period.

Notably, Coach Kim Sang-sik attempted rotation and personnel experimentation throughout the tournament. He called up new faces from V.League, gave opportunities to young players and lesser-known names. But as I wrote after the semifinals: those experiments did not yield the desired results. The team did not lose for lack of ideas, but for lack of players capable of executing those ideas at the required level. That is a squad-depth problem, not a tactical-scheme problem.

In a season where V.League and domestic competition schedules are compressed, clubs must grind through three-day match intervals in many phases. National team pillars are also club pillars, and they have no recovery time. Injuries are an inevitable consequence, not bad luck. When I was an assistant coach at Sanna Khanh Hoa BVN in 2026, we were relegated with only 21 points from 26 matches. In hindsight, the cause was not any specific match, but our lack of contingency plans for four key positions. Data on left-flank gaps in 61% of our defeats was in my hands by round 20, but the intervention window had passed. I understand that data only has value when paired with the timing of intervention. And for Vietnam now, the intervention window is narrowing.

Tactical analysis: The problem is not the formation

Looking at how Coach Kim Sang-sik operated during the 2026 ASEAN Cup, he did not pursue a fixed system. He alternated between four-at-the-back and five-at-the-back depending on the opponent, but the common thread was that the team always tried to control the ball in their own half before switching to quick attack. This is a pragmatic approach, suited to a team without physical advantages against West or Central Asian opponents. But pragmatism is only effective when the links can be replaced without breaking the structure. That is what Vietnam has not achieved.

When the team loses a central midfielder capable of escaping pressure, the midfield immediately becomes chaotic. When the main striker is out of form, the attack does not create enough chances. These problems cannot be solved by switching from 4-2-3-1 to 3-5-2. They can only be solved by players of sufficient quality to compete at continental level, or by a tactical structure that reduces the burden on each individual.

I once wrote that tactics cannot save a team, but they help us know where we die. For Vietnam currently, the point of death lies in their resilience when they lose players. At ASEAN level, that can be compensated by individual effort. But at Asian Cup level, where opponents like Japan, South Korea or Iran can press continuously for 90 minutes, there is no room for gaps caused by missing players. That is why I believe Coach Kim's problem is not tactics, but resources. He needs more players capable of performing at continental level, or at least a squad deep enough to rotate without losing quality.

A summer of empty stadiums taught me that applause is just a coat of paint. Coach Kim's personnel experiments at the ASEAN Cup, viewed positively, were an effort to build depth. But viewed from a results perspective, it was a failed gamble. He cannot both experiment and win in a tournament where fans expect the title. Pressure from public opinion, from VFF leadership and from the senior players themselves is making every decision heavier. At 59, I understand that winning is less important than explaining why you won. But Coach Kim has no time to explain. He only has time to win.

Counterintuitive angle: The blind spot is the calendar, not the people

There is an implicit assumption in most commentary about Vietnam: that Coach Kim Sang-sik is failing to build the team. I don't think so. I believe Vietnam's ASEAN Cup failure is the consequence of a more systemic problem: the domestic calendar is not designed to protect national team resources. V.League clubs face performance pressure, they use key players to the maximum, and when those players join the national team, they arrive exhausted.

This is a form of risk transfer: clubs benefit from exploiting players, while the federation and national team bear the consequences. No tactical solution can heal an overloaded player. No formation can replace a defender with a torn ligament. And no tactical training session can produce a creative midfielder in a few weeks, when such players need years to mature.

The biggest blind spot of Vietnamese football right now is not a lack of talent, but a lack of coordination between stakeholders in managing player load. I spent six months reviewing 120 European matches played before empty stands during the pandemic to understand that even top teams collapse when they lose key players, if they lack an effective rotation system. Vietnam does not yet have that system. And until it does, every coach — whether Kim Sang-sik or anyone else — will always be in a race against time.

What to verify in the November window

The November international window will be the first test of Coach Kim's adjustments after the ASEAN Cup. I will track three specific signals. First, whether he continues to call up new faces or returns to the old framework to secure short-term results. Second, how the team defends when losing the ball — if large gaps between lines remain, the structural problem is unresolved. Third, and most importantly, the ability to keep a clean sheet in the first half, as that is an indicator that the team has learned to start matches without relying on luck.

A tactics board is like a landslide map — it shows where not to stand. For Vietnam, the place not to stand is the position of complacency. This team remains a top power in Southeast Asia, but the gap with regional rivals is narrowing, while the gap with Asia's top teams remains vast. The Asian Cup is not a tournament for experimentation. It is a tournament to prove that the preparation process is on the right track. And if that process is not improved at its roots, every effort by Coach Kim Sang-sik will be arrows drawn on a map that never reach their target.