AFF Cup 2026: Tactical Puzzle for Coach Kim Sang-sik and Vietnam's Chances

In the 89th minute, My Dinh National Stadium held its breath as Van Toan sprinted down the right flank. The cross cut through the penalty area, but no Vietnamese striker touched the ball. The last chance slipped away, and the match ended 0-0 against Indonesia. That was the moment I realized the problem wasn't fitness or spirit, but tactical structure. When I reviewed the footage, I counted 7 times Vietnamese players passed back to goalkeeper Dang Van Lam in the second half, instead of seeking space ahead. This wasn't indecision, but a sign of a system lacking clear direction. The AFF Cup 2026 is underway with high expectations from Vietnamese fans. Coach Kim Sang-sik, the successor to Park Hang-seo, faces pressure to win the championship. Vietnam possesses a talented generation of players like Nguyen Quang Hai, Nguyen Tien Linh, and Vu Van Thanh, but recent results have been unconvincing. The 0-0 draw against Indonesia in the opening match of Group B raised questions about match control and chance creation. This is the first time Vietnam failed to score in an AFF Cup opener since 2026. Pressure from media and fans is mounting, especially as Thailand won 3-1 against Singapore on the same day. Historical context is also notable: Vietnam won the AFF Cup twice in 2026 and 2026, but never successfully defended the title. Since 2026, the team has gone through three coaches, each with a different philosophy. This instability has affected the development of playing style and player cohesion. Meanwhile, rivals like Indonesia and Thailand are investing heavily in youth development and long-term strategies. Data analysis from the match shows Vietnam had 62% possession but only 3 shots on target. Pass accuracy was 87%, but most were sideways or backward passes. This reflects a tactical problem: the team lacks a creative midfielder capable of breaking down opposition defenses. Compared to the Park Hang-seo era, the team had Xuan Truong with his long-range passing ability, but currently no one fulfills this role. Quang Hai, the most expected player, touched the ball only 34 times, significantly lower than his average of 52 times at Binh Duong Club. Statistics from Vietnam's last 5 matches show an average of only 4.2 shots on target per match, significantly lower than Thailand's 6.8. This indicates the problem lies not only in finishing but also in chance creation. Coach Kim Sang-sik has experimented with various formations, from 3-4-3 to 4-2-3-1, but hasn't found the balance between defense and attack. In the Indonesia match, he used a 4-2-3-1 formation with Hoang Duc and Hung Dung as holding midfielders, but both were defensively oriented, creating a large gap between midfield and attack. A notable point is the role of the full-backs. In the Indonesia match, Van Thanh and Van Hau frequently pushed forward but lacked support from central midfielders. This created large spaces on both flanks, allowing opponents to exploit. Data shows Indonesia had 5 dangerous counter-attacks from situations where Vietnam lost the ball on the wings. Compared to the 2026 AFF Cup final, where Vietnam conceded only 4 goals in 8 matches, the current defense lacks solidity. Center-back Que Ngoc Hai had 2 dangerous fouls in the penalty area, an alarming number. Deeper analysis of attacking capability: Vietnam had 12 crosses but only 2 successful. Tien Linh, the main striker, touched the ball only 18 times throughout the match, showing he didn't receive the necessary support from the midfield. Compared to Indonesia's striker Dimas Drajad, who had 25 touches and created 3 chances, Tien Linh was almost invisible. This raises questions about Coach Kim Sang-sik's personnel arrangement: should he use two strikers to increase pressure on the opponent's defense? Another important factor is match psychology. Pressure from fan expectations has affected players' confidence. In the Indonesia match, I observed many players tending to make safe passes rather than taking risks. This is clearly shown by the number of passes back to the goalkeeper: 7 times in the second half, compared to only 2 in the first half. This difference shows players are more afraid of making mistakes than creating differences. This is a psychological issue that Coach Kim Sang-sik needs to address, not only through tactics but also by building team confidence. Contrary to the popular view that Vietnam needs a complete overhaul, I believe the problem lies in the lack of patience in building a playing style. Many fans are comparing to the Park Hang-seo era, but they forget that Park took 2 years to build an effective defensive counter-attacking style. Kim Sang-sik has only been in charge for 6 months, and changing too quickly will create instability. Based on my experience watching matches, I've noticed that Southeast Asian teams typically need at least 1 year to adapt to a new philosophy. Sacking the coach mid-way will only worsen the problem. Another blind spot is underestimating opponents. Indonesia is no longer a weak team. They have invested heavily in youth development and naturalized players. The 0-0 draw is not a failure, but a signal that Vietnam needs to respect opponents more. Data from the Indonesian league shows their young players are playing at higher intensity, averaging 11.2 km per match, compared to 10.8 km for Vietnamese players. This shows the physical gap is narrowing. Furthermore, I believe that focusing too much on immediate results will ruin long-term strategy. If Vietnam only chases results at the AFF Cup without building a solid foundation, we will repeat the mistakes of previous generations. Look at Thailand: they invested in youth development from 2026 and are now reaping the rewards. Vietnam needs to learn from that instead of just criticizing the coach. The AFF Cup 2026 is not a sprint but a marathon. Vietnam still has a chance if they can adjust tactics and maintain spirit. The question is: Will Coach Kim Sang-sik have enough patience to build a sustainable playing style, or will he be defeated by the pressure of results? Only time will tell. But I believe that if we look beyond a single tournament, Vietnamese football will have a stronger foundation for the future. Let the coach and players do their work, and we will see worthy results.