BARCELONA, Spain (AP) — Olympic champion David Boudia of the United States leads after the semifinals of 10-meter platform diving at the world swimming championships.

Boudia opening dive Saturday at the Montjuic pool received one perfect 10 and nothing lower than a 9.0 from the judges. He led through all six rounds, finishing with 534.40 points.

China's Qiu Bo, the silver medalist behind Boudia at the London Olympics, led after the morning preliminaries. He only finished sixth in the semifinals after a poor first dive, though still good enough to advance to the final.

Mexico's Ivan Garcia was second, followed by Germany's Sascha Klein. Olympic bronze medalist Thomas Daley was seventh despite a triceps injury that required treatment.

The top 12 advanced to Sunday's final — the last pool diving event of these championships.