LONDON (AP) — Ilya Zakharov of Russia led the men's 3-meter springboard preliminaries, with He Chong of China close behind in second during a competition marked by pratfalls.

Zakharov totaled 507.65 points during the six rounds on Monday. He earlier won a silver medal in synchronized 3-meter with partner Evgeny Kuznetsov, and was the silver medalist in the individual event at last year's world championships.

He, who was ninth after his opening dive, totaled 500.90 while opening defense of his Olympic title.

Troy Dumais of the U.S. was third at 486.60 after rallying from sixth in the fourth round.