Why missing Xuan Son made Vietnam clearly weaker: tactical and data review after 0-2 loss to Thailand

Bandung, Indonesia — when the final whistle blew, the scoreboard showed a 0-2 defeat for Vietnam. Thailand did not need to dominate possession to win. One long-range strike from Sarach Yooyen, a compact low defensive block, and a disciplined counter-attacking plan were enough. Vietnam held the ball, circulated it, but could not score a valid goal.

In Tuoi Tre newspaper, expert Doan Minh Xuong said directly: “Without Xuan Son, Vietnam’s attack is clearly much weaker.” The statement is accurate, but stopping there would miss the deeper lesson: why losing one striker caused the whole attacking structure to collapse, and who is responsible for the lack of a Plan B.

The match took place in Bandung in Group B of the ASEAN Cup 2026, a tournament organized by AFF. Vietnam had beaten the Philippines 1-0 earlier, but Thailand was the real test. Doan Minh Xuong called Vietnam-Thailand a “50-50” match. The team that took its chances would win. Thailand scored from its first shot on target.

Vietnam entered the match without a full squad. Nguyen Xuan Son was injured in the opening match and left the tournament. Nguyen Hoang Duc was returning from injury. Many players were not in good physical condition. Coach Kim Sang Sik had to work with a patchwork lineup.

The defeat meant Vietnam lost control of its destiny in the group. It also created pressure on the coach. But before discussing pressure, we must discuss structure.

Vietnam’s entire attacking system is built on one axis: Nguyen Xuan Son. He is not merely a goalscorer. He is the only center-forward who can shield the ball, hold off center-backs, and create space for wingers. When he plays, the midfield has a safe target. When he is absent, that target disappears.

Nguyen Dinh Bac was deployed as the highest striker, but he is not the same profile as Xuan Son. Dinh Bac is a runner who likes to receive the ball in wide areas or in behind, not a physical target man. Asking him to play as a hold-up striker is a design error. Vietnam lost the ability to keep the ball high up the pitch and was forced into long-range shots.

Thailand, by contrast, had a clear plan. Chanathip Songkrasin played as a false nine, dropping deep to pull center-backs out of position. Vietnam’s midfield did not know who should mark him, and gaps opened between the lines.

After the opening goal, Thailand retreated into a deep block. They allowed Vietnam to hold the ball in harmless areas but blocked the central corridors. Vietnam had to shoot from outside the box — the easiest type of attack to defend.

A Vietnam goal was disallowed after a VAR check for offside. If that goal had stood, the match might have changed. But football does not run on “if”. VAR is part of the game.

In the second half, Kim Sang Sik switched from 3-4-3 to 3-5-2, moving left-back Cao Quang Vinh into central midfield. That was a clear sign of a midfield shortage. Hai Long and Hoang Duc improved ball circulation, but cohesion is not the same as creating chances.

The 0-2 loss was not a robbery. Thailand defended well and counter-attacked more sharply. Without published xG data, we cannot measure the exact gap, but the pattern of sterile possession was clear.

Now I want to turn the “no Xuan Son” narrative upside down. Saying Vietnam was weaker without Xuan Son is true. But blaming the whole defeat on one absentee is too convenient.

The defeat exposed three structural problems: an incomplete squad with poor fitness, a thin midfield that forced a left-back into the center, and no alternative to the main striker. All three are management and preparation issues, not fate.

Dinh Bac was criticized for doing nothing, but the fairer question is: who placed him in a role that does not fit his qualities? A young player forced into an unsuitable role and then blamed for failing is a process failure.

Thailand’s squad depth was the difference. They could substitute without losing quality. Vietnam could not. This is a structural advantage, not a one-match advantage.

I remember 2026, when I said Croatia would reach the World Cup final. People called me crazy. Croatia did not reach the final because of luck. Croatia reached the final because they ran 12 kilometers more than their opponents. In this match, Thailand ran into the right spaces while Vietnam ran into harmless areas.

Fans will remember Sarach’s long-range goal. I remember the third pass before that goal, when Chanathip dropped deep and opened up the midfield. A goal is the end of a sequence, not a miracle.

Seven years ago, I asked a V.League coach about xG and was laughed at. I did not get angry. When the press room laughs at xG, I know I am reading the book they have not opened.

The reliance on a naturalized striker hides a long-standing gap in Vietnam’s development system. Domestic academies have not produced a true target forward for years. That is a systemic issue, not the fault of a young player.

The tournament being held in Bandung also signals Indonesia’s growing role in Southeast Asian football. Vietnam cannot stay still.

The most important takeaway is simple: do not treat Xuan Son as a savior. Even when he returns, Vietnam needs an attacking plan that does not depend on one person. The bigger question is not when Xuan Son will return. The bigger question is when Vietnam will stop placing the entire system on one man’s shoulders.