Competition System

Sixteen participating teams for the 2025/26 U19 ABA League Championship will be divided into four first stage groups.

In the first stage, all teams will face each other team within a group in a round-robin system. The two best-placed team of each group will advance to the final tournament. At the final tournament, the teams will play three games – the quarter-final, semifinal or clasification, and the placement game. The winner of the final tournament will become the champion of the 2025/26 U19 ABA League Championship.