UAAP Season 65 men's basketball tournament
| Host school | National University | |||||||||||||||
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| Duration | September 26 to October 5 | |||||||||||||||
| Arena(s) | Araneta Coliseum | |||||||||||||||
| Finals MVP | Larry Fonacier and Wesley Gonzales (co-winners) | |||||||||||||||
| Winning coach | Joel Banal | |||||||||||||||
| Semifinalists | UE Red Warriors UST Growling Tigers | |||||||||||||||
| TV network(s) | Studio 23 and TFC | |||||||||||||||
The UAAP Season 65 men's basketball tournament refers to the men's basketball tournament of UAAP Season 65 (2002–03 season) of the University Athletic Association of the Philippines (UAAP). The tournament was hosted by National University. ABS-CBN covered the games on Studio 23.
Four-time defending champion De La Salle Green Archers were on their way on scoring a rare 14–0 sweep of the elimination round when they were stopped by the Ateneo Blue Eagles in their last game of the elimination round. The UE Red Warriors won over the UST Growling Tigers on the elimination round finale to secure the #2 seed against Ateneo in the semifinals. UST were blown out by La Salle in their semifinals series, while Ateneo won twice against UE, the deciding game via last-second shot from Gec Chia, to face La Salle in the Finals, a rematch of the previous season's championship series. In Game 1, Ateneo upset the Green Archers, but La Salle tied the series on the next game. In the deciding Game 3, Ateneo pulled away late in the fourth quarter to win their first title since 1988.
Ateneo's Enrico Villanueva was named Most Valuable Player, while teammates Larry Fonacier and Wesley Gonzales were named co-MVPs of the Finals.