Djokovic quickly finishes off Roddick

Andy Roddick spent less than an hour on the court during an emphatic loss to Novak Djokovic. Jo-Wilfried Tsonga needed a much longer run to advance against Milos Raonic.

Roddick lost 6-2, 6-1 to Djokovic in 54 minutes, leaving the 29-year-old American to fend off more questions about retirement. The second-ranked Djokovic had 34 winners on Centre Court at the All England Club. Roddick had 12.

Tsonga, of France, moved on by winning the longest set in Olympic history. He beat Raonic of Canada 6-3, 3-6, 25-23. The final set lasted three hours and 257 points.

Andy Murray, Marcos Baghdatis and Kei Nishikori also won on the men's side. Maria Sharapova and Venus Williams were among the winners in the women's tournament.

Water polo

Ryan Bailey and Peter Varellas scored three goals apiece and the United States recovered from a slow start to beat Romania 10-8 in the men's tournament.

The U.S., which took silver four years ago in Beijing, and gold medal-favorite Serbia are tied for the Group B lead with four points apiece after two matches. Serbia beat host Britain 21-7.

Montenegro, Croatia and Australia also won. Greece and Italy played to a 7-7 tie.

Shooting

U.S. Army Sgt. Vincent Hancock won the gold medal in the men's skeet competition at the London Olympics, his second straight. Hancock clinched the gold on his next-to-last shot, and missed only twice in 150 tries on Tuesday. Anders Golding of Denmark finished two targets back to win the silver, and Qatar's Nasser Al-Attiya won a shoot-off over Russia's Valery Shomin for the bronze. Hancock topped his own Olympic record by hitting 123 targets in qualifying earlier Tuesday, and was a perfect 25-for-25 in the medal round to wrap up the gold. It gives the U.S. a skeet sweep, after Kimberly Rhode won the women's competition earlier this week.

Field hockey

Shannon Taylor scored late in the first half and the U.S. upset Argentina 1-0 in women's field hockey. The Americans controlled long stretches of play against the No. 2-ranked team in the world, got some key saves from Amy Swensen and kept Argentine star Luciana Aymar largely silent throughout.

The U.S. got into the Olympics by stunning Argentina 4-2 in last year's final at the Pan American Games.

Diving

Chen Ruolin and Wang Hao led China to its third diving gold in London, this one off the big tower in women's 10-meter synchronized diving. China won going away with 368.40 points, and the country is nearly halfway to its goal of sweeping the eight diving events.

Mexico's Paola Espinosa and 15-year-old Alejandra Orozco took the silver, and Meaghan Benfeito and Roseline Filion won the bronze for Canada.

Rowing

Alan Campbell of Britain qualified fastest for the semifinals of the men's single sculls, providing another boost for the host nation at the Olympic regatta.

Campbell crossed in 6 minutes, 52.10 seconds in the first quarterfinal to beat the times of fellow winners Mahe Drysdale of New Zealand, Lassi Karonen of Sweden and Ondrej Synek, the pre-regatta favorite from the Czech Republic.

Britain is favored to win three women's events and has gold medal chances in several men's disciplines when finals begin Wednesday.

Handball

Defending Olympic champion France moved to the top of Group A in men's handball after a 32-20 win over Argentina.

Left back Nikola Karabatic scored seven times for France, which has 76 goals in two matches, more than any other team in the tournament.

Iceland, Hungary, Sweden, Croatia and Denmark were the other winners.

The Associated Press