In the first semi-final, U15 Hanoi I met U15 Tay Ninh. Although not rated higher in experience at some points at the beginning of the match, U15 Tay Ninh entered the game confidently and soon created notable opportunities that made it difficult for the Capital representative. However, U15 Hanoi I quickly regained control of the game, controlled the ball better and organized many attacks towards the opponent's goal.
The first half took place balancedly and closed without any goals being scored. In the second half, U15 Hanoi I continued to increase pressure. In the 50th minute, the young capital team put the ball into the net after a free kick situation, but the goal was disallowed due to offside.

The turning point came in the 66th minute when Minh Huy scored the opening goal for U15 Hanoi I. Taking advantage of the psychological advantage, coach Sy Hai's students continued to maintain the initiative and in the 77th minute, Duc Dat scored to increase the score to 2-0. This is also the final result, helping U15 Hanoi I win a ticket to the final.
In the remaining semi-final, U15 Song Lam Nghe An I faced The Cong Viettel I. U15 Song Lam Nghe An I was the team that started better and created a slightly better game in most of the first half. After many missed opportunities, in the 34th minute, Minh Chanh took advantage of Truong Van Tai's pass to score the opening goal for the young team from Nghe.
However, before the first half ended, U15 The Cong Viettel I managed to bring the match back to balance. In the 45+2 minute, Thanh Long took advantage of the opponent's defense's mistake to score the equalizer 1-1.

In the second half, U15 The Cong Viettel I played more proactively and organized many dangerous attacks. In the 79th minute, the soldier team was awarded a penalty and from the 11m spot, Tai Loc accurately finished to increase the score to 2-1. In the final minutes of the match, U15 Song Lam Nghe An I tried to find an equalizer but was unsuccessful.
In the end, U15 The Cong Viettel I won 2-1 to enter the final. Thus, the final match of the National U15 Football Tournament - Modern Cup 2026 will be a confrontation between U15 Hanoi I and U15 The Cong Viettel I, while U15 Song Lam Nghe An I and U15 Tay Ninh are tied for 3rd place overall.