Olympics: gold medals on day eight

Britain's Rebecca Adlington smiles on the podium after winning gold in the women's 800m freestyle at the National Aquatics Centre Photograph: Jerry Lampen/Reuters

Kirsty Coventry of Zimbabwe takes gold in the women's 200m backstroke Photograph: David Gray/Reuters

Oleksandr Petriv of Ukraine triumphs in the men's 25m rapid-fire pistol final Photograph: Desmond Boylan/Reuters

China's Zhang Ning defeats compatriot Xie Xingfang in the final of the women's badminton singles Photograph: Lars Baron/Getty

United States' Michael Phelps on his way to gold in the final of the men's 100m butterfly, which he won by 1/100th of a second from Serbia's Milorad Cavic Photograph: Greg Baker/AP

Rumyana Neykova of Bulgaria celebrates taking gold in the Women's single sculls Photograph: Vladimir Rys/Getty

Valeriy Borchin of Russia takes gold in the men's 20km walk Photograph: Kevin Frayer/AP

Duncan Free and Drew Ginn of Australia celebrate winning the men's pair final at the Shunyi rowing lake Photograph: Vladimir Rys/Getty

Norway's Olaf Tufte on his way to gold in the men's single sculls Photograph: Chuck Burton/AP

Cesar Cielo of Brazil triumphed in the men's 50m freestyle swimming final Photograph: Wolfgang Rattay/Reuters

USA's Vincent Hancock celebrates seconds after firing his last shot in the skeet shooting final Photograph: Nic Bothma/EPA

Romania's Georgeta Andrunache and Viorica Susanu power towards gold in the women's pair final at Shunyi Photograph: Fred Dufour/AFP

Saori Yoshida of Japan fights Xu Li of China during the final of the 55kg women's freestyle Photograph: Issei Kato/Reuters

Carol Huynh of Canada celebrates after defeating Japan's Chiharu Icho in the final of the 48kg women's freestyle wrestling Photograph: Issei Kato/Reuters

Britain's Tom James, Steve Williams, Pete Reed and Andrew Triggs-Hodge celebrate after winning the men's fours rowing competition Photograph: Tim Wimborne/Reuters

Britain's Bradley Wiggins is reflected on a the Laoshan velodrome's panel as he pedals to victory in the track cycling men's individual pursuit Photograph: Christophe Ena/AP