National University plays De La Salle-Zobel, while Ateneo takes on University of Santo Tomas as the UAAP Season 82 Juniors' Football Tournament opens Sunday at the Rizal Memorial Stadium.
The Bullpups, who have achieved big in two years of participation in high school play, takes on the Junior Archers at 1:30 p.m.
The Blue Eaglets, who placed third last season, will go up against the Tiger Cubs at 4 p.m.
Defending champion Far Eastern University-Diliman drew an opening-day bye, as the Baby Tamaraws will open their quest of a record 10th straight title at 1:30 p.m. on Wednesday against the Tiger Cubs at the same Malate venue.
All first-round matches will be played at the Rizal pitch except on Jan. 12, where action will shift to FEU-Diliman, where the Baby Tamaraws and the Bullpups clash in a rematch of last season's Finals at 4 p.m.
FEU remained in the throne after a 1-0 win over NU in the one-game final last February.