The knockout stage of 2012 Indonesia Super League U-21 is scheduled to begin on 28 June 2012 and to be completed on 1 July 2012 with the final at the Kanjuruhan Stadium in Malang Regency.
Host clubs Arema FC U-21 failed to qualify for the semi-finals.
Assistant referees: Jhonie Mudjianto Fourth official: Iwan Sukoco Man of the Match:
Ficky Pangerapan Fourth official: Maulana Nugraha Man of the Match:
Assistant referees: Mudjianto Jhonie Fourth official: Iwan Sukoco Man of the Match: Lerby Eliandry Pong Baru Assistant referees: M. Yamin Saputra, Mpd.