Liga 1 U-19
From the 2017 season onwards, the competition age limit decreased from under-21 to under-19.[1] Building and managing a complete U-19 team is one of the requirements for clubs participating in Liga 1, as regulated by the Football Association of Indonesia (PSSI).Differently than the main Liga 1, this junior competition, divided into four acts, consists of two group stages and two knockout rounds, which is the semifinals and final.On the first stage, the 18 participating clubs are divided into three groups, each containing six clubs, the top two teams of each group and the two best third place will advance to the second stage.The winner of the semifinals will advance to the final to battle for the championship.