Vietnam still has problems to solve after ASEAN Cup triumph

3 goals conceded in 8 matches. 6 clean sheets. A second consecutive ASEAN Cup title.

Numbers don't lie, but they keep secrets.

Looking at the statistics, fans might believe that Vietnam's defense under Kim Sang Sik has reached a new level. But if you watch every minute of the tournament, you see a different story. A story of missed chances by opponents, of woodwork interventions, of outstanding saves by goalkeeper Patrik Le Giang.

The truth is: Vietnam's defense often looked surprisingly vulnerable, despite the clean sheets.

Tactical context: Is the improvement real or just an illusion?

Compared to the 2026 ASEAN Cup campaign, where Vietnam conceded 6 goals, the 3 goals in 2026 is a clear statistical improvement – a 50% reduction. But look at the process.

In the group stage and semifinals, Vietnam conceded only 1 goal (in the 3-1 win over Cambodia). The remaining 2 goals came in the final – the only match against the strongest opponent in the tournament. This suggests a worrying trend: when facing higher-quality opposition, the defensive vulnerabilities become more apparent.

Kim Sang Sik acknowledged this in his post-tournament press conference: "We need to prepare more for the defense. The players did well, but there are still mistakes to fix."

This is a significant signal. When a coach publicly admits problems right after winning a title, it shows he is looking beyond the trophy.

Core analysis: Weak first half, strong second half – a deliberate pattern?

Throughout the tournament, a recurring pattern: Vietnam started slowly, struggled in the first half, and only played well after halftime or after Kim made tactical adjustments.

This is not a deliberate strategy. It reflects the team's limited ability to impose their style of play from the outset. It could be due to overly cautious pre-match preparation, or poor initial reading of the game. Whatever the reason, relying on halftime adjustments is a tactical weakness.

Kim Sang Sik's strength is his ability to change the game in the second half. This shows he can read the game and make timely decisions. But this reactive approach is unsustainable against opponents who can exploit early mistakes and control the tempo – exactly what Vietnam will face at the 2027 Asian Cup.

Contrarian view: An outstanding goalkeeper may be hiding a structural problem

Patrik Le Giang had an excellent tournament. His saves directly earned clean sheets. But if you rely on your goalkeeper to bail you out repeatedly, it means the defense in front of him is allowing too many chances.

Imagine a scenario: Patrik Le Giang gets injured or his form drops. Would Vietnam's defense still maintain its impressive record?

The goal concession statistics are good, but the defensive process – the number of chances created by opponents, the quality of those chances – is a different story. This is an execution blind spot: the results mask the problem.

Takeaway: Questions for the 2027 Asian Cup

The ASEAN Cup is a deserved victory. But it is a regional victory, where Vietnam has dominated. At the Asian Cup, opponents will be South Korea, UAE, and Yemen – teams that are not only stronger but also capable of fully exploiting Vietnam's first-half weakness.

The unsolved problem: How can Vietnam start a match with initiative instead of waiting for the second half? If Kim Sang Sik cannot solve this, the 2027 Asian Cup could be a harsh reminder that regional and continental levels are two different worlds.

Minute 69 of an Asian Cup match might teach us something. But first, Vietnam needs to survive the first 45 minutes.