Coach Kim Sang-sik and the Personnel Puzzle: From AFF Cup Failure to the Quest for Vietnam Football's Identity

The transfer window is always a time of noisy contracts and promises of a bright future. But for Vietnamese football, the quiet period between two World Cup seasons is when people look back at the deepest cracks in the foundation. I have followed the national team's journey through many AFF Cups, and never has the feeling of an identity crisis been so clear. The failure at AFF Cup 2026 is not just a defeat; it is a mirror reflecting structural deficiencies that no blockbuster contract can hide. The context of the problem lies in the generational transition. The golden generation with Quang Hai, Cong Phuong, Van Hau is gradually passing its peak, while the next generation of players has yet to prove their ability to shoulder responsibilities in the regional arena. Coach Kim Sang-sik arrives with a heavy legacy from his predecessor Park Hang-seo, who built a defensive counter-attacking system based on discipline and fighting spirit. But football does not stand still, and regional rivals like Thailand and Indonesia have found ways to neutralize that style of play. The failure to refresh the squad and tactics has pushed the team into a passive position, without a clear identity to cling to. The core point I want to analyze lies in the personnel puzzle that Coach Kim Sang-sik is facing. Data from the group stage matches of AFF Cup 2026 shows a lack of stability in the starting lineup. Vietnam's average possession rate was only 48%, significantly lower than Thailand (58%) and even Indonesia (52%). But these numbers do not tell the whole story. The problem lies in the quality of the final balls. The number of big chances created in 4 matches was 7, but only 4 goals were scored, showing a lack of sharpness in the attack. Wingers, a position that was once a lethal weapon for Vietnamese football, have now become a weakness as opponents have figured out the inside-cut moves. The uniformity in the approach of wingers, who almost only have one option of cutting inside onto their stronger foot, has made the play predictable and harmless. The contrarian angle here is what I think few people see: the over-specialization in a single style of play is killing the tactical diversity of the team. We used to be proud of the disciplined, tight-defending style of the Park Hang-seo era, but that very discipline has become a shackle when opponents have become too familiar with it. Other Southeast Asian teams no longer fear being pressed by Vietnam; they proactively concede possession and wait for mistakes from our slow build-up play. The lack of flexibility in switching between tactical formations, from 3-4-3 to 4-3-3 or 4-2-3-1, shows a stubbornness in thinking. Coach Kim Sang-sik, coming from a Korean football background where flexibility and speed are emphasized, seems to have not yet found the formula to convey that philosophy to a team accustomed to defending and waiting. The personnel puzzle is not just about who to field, but also a story about how we train and develop players. Our youth training system has produced technical talents, but lacks diversity in player profiles. We have too many central midfielders with good ball control but lack true center forwards with aerial ability and intelligent positioning. I remember the image of a young striker in the U23 Vietnam jersey, who had good speed and technique but often lost his bearings in the penalty area. This shows a gap in training, when we focus too much on individual technique while neglecting the development of tactical thinking and game-reading ability for players. Looking ahead, the biggest question is not whether Coach Kim Sang-sik will be sacked or have his contract extended, but whether we dare to abandon old formulas to build something newer. The return of veteran players like Quang Hai may bring immediate stability, but it is also an admission that we lack worthy replacements. I believe Vietnamese football needs a revolution in thinking, starting with accepting risks with young players, accepting mistakes during development, and most importantly, building a unique identity not bound by past successes. The failure at AFF Cup 2026 is not the end, but an opportunity to look at ourselves. The journey ahead will not be easy, but with a clear plan and patience, Vietnamese football can find its position on the regional map again. The question is whether we are brave enough to step out of the comfort zone of old tactics or not.