LOS ANGELES, April 13 — Victor Wembanyama scored 34 points as the San Antonio Spurs stunned the Denver Nuggets 121-120 yesterday to upend the race for the No. 1 seeding in the NBA Western Conference.

French rookie Wembanyama, who has produced a dazzling debut season in the NBA despite playing on a struggling Spurs team, was superb once again as San Antonio pulled off a remarkable victory over the reigning NBA champions.