U23 Vietnam vs U23 South Korea: Waiting for a Shock from an Unnoticed Run

This afternoon, at Paloma Mizuho Stadium in Nagoya, I stood at the corner of the pitch watching U23 Vietnam's familiarization session. The air was cold, the wind was light, and the sound of studs hitting the grass was clear in every step. But what stopped me was not the rehearsed aerial balls; it was how Dinh Quang Kiet – a 1m95 center-back – kept lowering his center of gravity every time the ball was launched into the box. He did not jump early, did not rush into challenges; he simply held his position and read the landing point. A small detail, but it revealed the whole plan of the red-shirted team against a far superior opponent. I do not ask; I only watch how they stand, how they gesture, and how the match changes course. In the stands, a group of Vietnamese fans were stretching a large flag. They came from different cities, meeting in Japan to support a generation of young players. The atmosphere was tense but full of hope. Everyone remembered that afternoon in January when U23 Vietnam shocked Asia by beating U23 South Korea at the AFC U23 Asian Cup. Now that memory is placed on the scale against a much stronger opponent. This match has drawn special attention from Vietnamese fans. Dan Tri newspaper planned live coverage from Paloma Mizuho Stadium, showing the appeal of the young national team. In contrast, South Korean media put the championship goal at the forefront, and that expectation is also a burden. Two completely different atmospheres: one is hope mixed with uncertainty, the other is pressure to deliver. For a young team, every big match is a valuable lesson. They have nothing to lose, and precisely because of that, they can play football without mental baggage. What matters is trusting the process, trusting what has been built through all the training sessions. The context of this men's football quarterfinal at Asiad 20 is not just about winning or losing. For U23 South Korea, it is a mission to protect the status of a major football nation. They brought to this tournament a squad featuring many players based in Europe and used the full quota of three over-age players – a regulation allowed by the Asian Games. This creates a clear gap in squad quality, international experience, and physicality compared to U23 Vietnam, who added no over-age players at all. Coach Dinh Hong Vinh placed his trust in the players who helped him get through the group stage, young players forged in each match rather than star reinforcements. Tactically, U23 Vietnam will almost certainly choose a deep defensive block and wait for counterattacking opportunities. What we can expect is a low defensive shape, two packed lines, and central midfielders playing close together. When they win the ball, they will look to move forward quickly, exploiting the space behind South Korea's high defensive line. This is a familiar script for underdogs facing a superior opponent, but it demands extreme discipline and coordination between the lines. The Dan Tri article described U23 Vietnam calmly absorbing pressure in the opening minutes before launching counterattacks that caught the opponent off guard. This shows a deliberate defensive-counterattacking plan, not a possession-based approach. Under South Korea's pressure, the smallest passing error in their own half could be punished with a goal. The biggest concern is fitness. The opposing coach is expected to make his players play fast, in a style that 'tortures' U23 Vietnam's physical condition. High-intensity play, aggressive pressing, and aerial duels are the trademark of South Korean football. If the match goes past the 70th minute, the endurance of Vietnam's defense becomes the biggest question. Youth can help maintain the tempo, but top-level professionalism and habit cannot be replaced by spirit alone. That is why Dinh Quang Kiet's role becomes especially important. The 1m95 center-back is not just a shield in the box against South Korea's aerial balls; he can also become an attacking weapon in set-piece situations. When the team defends with numbers, pushing Quang Kiet forward for corners and free kicks could create something unexpected. This is a contingency solution often used by smaller teams, but it also shows that U23 Vietnam lacks diverse attacking options in open play. In attack, Nguyen Quoc Viet is expected to recreate the memory of scoring against South Korea. He scored in the historic win at the AFC U23 Asian Cup in January. His hunger is obvious, but the opponent has changed: they added European-based players and three over-age players. Quoc Viet's chances of receiving the ball near the Korean box will be fewer, and placing too much hope on one individual always carries risk. If the midfield cannot supply him, all that remains is waiting for a moment of brilliance. The midfield battle will decide the match. If U23 Vietnam cannot win the ball in safe areas and launch quick transitions, they will be trapped in a passive defensive game. South Korean players based in Europe bring not only better technique but also the confidence of those accustomed to elite football environments. They know how to control the rhythm, how to apply pressure without exposing space. This makes Vietnam's mission much harder, because quick counterattacks can be read before they even develop. One bright spot is that this team has shown cohesion in previous matches, and the unity of a young squad without over-age stars can sometimes be more frightening than expensive names. Psychological pressure is leaning toward South Korea. They must win, they must be champions, because that is the shortest path for young players to complete mandatory military service. This creates an invisible burden: if the score stays level until the end, impatience could cause South Korea's defense to make mistakes. Conversely, U23 Vietnam is allowed to lose, allowed to play with full effort without fear of condemnation. In elite sport, this can be the most important psychological advantage. The optimism before this match is mainly based on the win over South Korea at the U23 Asian Cup in January. However, this is a cognitive trap. One victory is too small a sample to conclude that Vietnam can repeat the scenario. The U23 South Korea team at this Asiad is no longer the team that lost in January: they added players from Europe and used the full over-age quota. In other words, the opponent has clearly upgraded, not remained the same. Even the defensive-counterattacking tactic that once worked could be neutralized by an opponent that handles open play and set pieces better. South Korea's three over-age players are usually experienced pillars, helping the team stay calm in difficult moments. They are the ones who guide the younger players through the psychological pressure of a knockout match. Another counter-intuitive view: U23 Vietnam's decision not to use over-age players is not necessarily a disadvantage. It reveals a long-term development strategy, where young players are given the chance to test themselves against strong opponents. But it must also be admitted that lack of experience could make the team panic if they concede early. Can a young squad, without senior guidance, have enough composure to come from behind? The answer is probably no, unless they score first. That is why the most important thing for U23 Vietnam is not winning, but staying calm in the first 20 minutes. If they survive this phase, the match will open up for them. People often say: the biggest change usually starts from a run that no one notices. This match is not only about a ticket to the semifinals; it is also a test for Vietnam's youth football development strategy. Even if they cannot create a shock, U23 Vietnam has sent a clear message: the generation born after 2026 is not afraid of big teams. There are revolutions without slogans, only training sessions that no one films. Like the groundkeepers who still tend the grass in an empty stadium, this young team knows its value is not defined by one match. When the stadium lights come back on, they will stand in the right position, ready for a new era. And that matters more than any shock tonight. I will stop here – before the ball rolls.