Kicking off the first of his seven events at the eight-day meet, Phelps led off a surprising bronze-medal showing in the relay Sunday at the Oriental Sports Center.
Defeated by archrival Park Tae-hwan in the men's 400m freestyle and so failing to produce an opening victory for the host at the 14th FINA World Championships in Shanghai on Sunday night, China's rising star, Sun Yang, was still satisfied with his swim.
Olympic champion Park Tae-hwan of South Korea showed he's back in top form and Italy's Federica Pellegrini remained unbeatable in the 400-meter freestyle on the opening night of swimming worlds.
Chinese veteran diver Wu Minxia claimed the women's 3m springboard gold medal, the ninth gold for the hosts, at the 14th FINA World Championships on Saturday.
Quelling a strong Hungary comback in the last three minutes, Australia edged Hungary 10-9 to book a last eight position at Swimming Worlds women's water polo here on Saturday.
The International Swimming Federation (FINA) has found no positive case in the first week of the ongoing 2011 FINA World Championships, said FINA officials in Shanghai on Saturday.