LONDON  - Andy Murray turned the tables on Roger Federer to grab tennis gold for Britain on Wimbledon's Centre Court on Sunday, four weeks to the day after Federer broke British hearts by beating him in the Wimbledon final.

The 6-2, 6-1, 6-4 thrashing of the world number one was the biggest win of Murray's career, and extended a dream run for the hosts that delivered six golds on Saturday, including three in the athletics stadium. "This has been the best way to come back from the Wimbledon final," Murray said. "I watched the athletics last night ... The momentum the team's had over the last week has been so good." Murray failed to add a second British gold, however, when he and Laura Robson lost to Max Mirnyi and Victoria Azarenka of Belarus in the final of the mixed doubles.

American Serena Williams and her sister Venus beat Andrea Hlavackova and Lucie Hradecka 6-4, 6-4 to claim their third Olympics doubles title. "There's something about standing next to Venus and holding that gold medal," Serena said. "Three times we've played, three times we've got the gold medal. So we are pretty stoked about it."

The spotlight swings back to athletics in the evening, with Usain Bolt answers the nagging question of whether he is still the fastest man on Earth, by sending sent out a chilling message to his rivals that he is fully fit and remains the man to beat in the Olympic 100 metres as he romped to victory in his semi-final in 9.87 seconds on Sunday. His chief rival and compatriot and compatriot Yohan Blake was also equally comfortable by clocking 9.85 sec ahead of American Tyson Gay (9.90). American Justin Gatlin, the 2004 winner back in action after a doping ban, impressively won the first heat in 9.82 but former world record holder Asafa Powell was only third in 9.94 and was scraped into the final as a fast loser despite getting a great start.

The line-up for the biggest show of the evening has been decided and the two fastest qualifiers - outside of the top two in each semi - were Asafa Powell (9.94) and Trinidad and Tobago's Richard Thompson (10.02). They joined Gatlin, Blake, Bolt (9.87), Gay and the relatively unknown Churandy Martina (9.91) and Ryan Bailey (9.96).

 The home run continued on Sunday when Ben Ainslie became the most successful Olympic sailor of all time, winning the Finn class in the waters off Weymouth on England's south coast to make it one silver and four straight golds.

The first gold of the 23 up for grabs on Day Nine was taken by Tiki Gelana of Ethiopia, who won a women's marathon that started and finished in torrential rain on a course that took in many of London's biggest tourist attractions. Not everything went Britain's way. Denmark's Lasse Norman Hansen won the men's multidisciplinary omnium on the cycling track, pushing Britain's Ed Clancy into third. It was only the second of the six events in the velodrome so far where Britain have not won gold. Hungary's double world champion Krisztian Berki broke British hearts as he dramatically snatched the Olympic pommel horse gold despite earning the same score as home favourite Louis Smith.

And in sailing, Sweden's Fredrik Loof and Max Salminen sailed a perfect medal race to beat Britain's defending champions Iain Percy and Andrew Simpson in the two-man Star class. Also in gymnastics, Romania's Sandra Izbasa upset American favourite McKayla Maroney to strike gold in the women's vault. In shooting, South Korean Jin Jong-oh overturned a huge deficit against compatriot Choi Young-rae and retain the men's 50-metre pistol title for his second gold of the Games.

In an exhilarating hour on Saturday night, Jessica Ennis, British poster girl of these Olympics, collapsed in tears of relief after a capacity 80,000 crowd roared her to victory in the heptathlon. Greg Rutherford was also hailed a hero by British newspapers after winning a surprise long jump gold while Mohammed Farah, born in Somalia but brought up in England, took Britain's first 10,000 gold.