SHANGHAI (AFP) - Olympic champion Park Tae-Hwan won his 400m freestyle duel with China's Sun Yang in resounding fashion Sunday as the hosts clinched a historic sweep of all 10 diving titles. South Korea's Park had his nose in front early on and finished nearly a length ahead of arch-rival Sun, 19, touching in 3min 42.04sec. Defending champion Paul Biedermann of Germany was relegated to bronze. "I am glad to swim in lane one, which allowed me to fully concentrate on my own tempo and not to get distracted by the competition," said Park, who flopped badly at the 2009 Rome worlds a year after his Olympic success. In one of the championships' most anticipated events, Park's winning time was well outside Biedermann's record of 3:40.07, set two years ago in Rome with the aid of the polyurethane swimsuits which are now banned. China's Sun, who has set the year's fastest times in four events, including the 400m free, was delighted with his first world championships silver medal after claiming 1500m bronze two years ago in Rome. "It's strange that nobody wanted to take the lead in the first 200m. And Park was in lane one so it's hard for the other swimmers to notice him," Sun said. "Anyway it is my first time to win a silver medal in the world championships so I'm satisfied. It's really a breakthrough for me." World and Olympic champions the Netherlands left it late in the women's 4x100m freestyle relay before piping the United States, as Dutch anchor Femke Heemskerk overtook Dana Vollmer with just 25m to go. Germany took bronze. And Italy's Federica Pellegrini successfully defended her 400m freestyle title in 4:01.97, beating Olympic champion Rebecca Adlington into second spot with France's Camille Muffat third. Shanghai's Oriental Sports Centre also witnessed the final act in China's magnificent 10-out-of-10 diving performance, putting the seal on a decade of dominance. Qiu Bo epitomised China's diving mastery as he collected 585.45 points in the final, more than 40 ahead of American David Boudia with Germany's Sascha Klein taking bronze. But there was to be no fairy-tale for British defending champion Tom Daley, 17, who was competing despite the death of his father from cancer in May and finished fifth. "There is a big gap between me and Qiu Bo," Daley admitted. "The Chinese are fantastic. But you can see that everything can happen, and you can see the Chinese made mistakes in today's competition." It was one of only two individual events in which China did not seal both gold and silver, underscoring the wide margin they enjoy over their closest rivals. And Shanghai, where China are hosting their first world aquatics championships, was a fitting venue for the comprehensive display, which has been watched this week by basketball icon Yao Ming. China have long threatened the elusive clean sweep after claiming seven out of eight at the 2008 Beijing Olympics and taking seven of 10 at the Rome world championships a year later. But in Shanghai the battle has been for second and third place with competitors celebrating wildly when they seal a silver or bronze medal, knowing gold is beyond reach. China's display came despite January's retirement of "diving queen" Guo Jingjing, whose partner Wu Minxia stepped up to claim her first individual world title, as well as the 3m synchro with new team-mate He Zi. Also on Sunday, dope-row sprinter Cesar Cielo pleaded with his critics to leave him alone as he topped the semi-final times in the 50m butterfly.