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Brazilian gymnast Arthur Nabarrete Zanetti won the men's rings final.

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Gabrielle Douglas of the US competed in the women's uneven bars final.

Dominic Ebenbichler/REUTERS

Chile's Jorge Garcia Bustos applied chalk to his hands during the men's 105kg Group B clean and jerk weightlifting competition.

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China's Ding Ning eyed the ball as she competed against South Korea's Kim Kyungah in the women's table tennis semifinal.

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Richard Lambourne of the US passed the ball against Tunisia in volleyball.

Sergio Moraes/REUTERS

Netherlands' Sophie Polkamp, left, looked on as Great Britain's Anne Panter controled the ball during their field hockey match.

Murad Sezer/REUTERS

New Zealand's Alexis Pritchard, left, fought Russia's Sofya Ochigava in a quarterfinal women’s light (60kg) boxing match.

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New Zealand's Valerie Adams competed in the women's shot put.

Kai Pfaffenbach/REUTERS

Estonia's Gerd Kanter competed in the men's discus.

Ng Han Guan/AP

Martin Tesovic of Slovakia participated in men's 100 kg weightlifting.

Lefteris Pitarakis/AP

South Korea's Kim Young-ran, right, and Belgium's Gaelle Valcke fought for the ball in a preliminary round women's field hockey match.

Paul Sancya/AP

Keitani Graham of Micronesia competed against Charles Edward Betts of the US, right, in 84 kg Greco-Roman wrestling.

Marko Djurica/REUTERS

South Korea's Jung Suyoung, left, challenged Denmark's Mikkel Hansen in their men's handball match.

Eddie Keogh/REUTERS

Britain's Margaret Adeoye, right, ran ahead of Allison Peter of the US Virgin Islands in a women's 200m round 1 heat.

David Goldman/AP

Peter Charles, of Great Britain, rode Vindicat in the equestrian show jumping team competition.

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Kellie Wells of the US, left, and Colombia's Lina Florez ran in a women's 100m hurdles round 1 heat.

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Germany's Lisa Ryzih took to the air in the women's pole vault final.

Jorge Silva /REUTERS

China's He Chong performs a dive in the men's 3m springboard preliminary round.

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Ken Nee Yeoh of Malaysia dove in the men's 3m springboard preliminary.

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Ballestero Carbonell and Andrea Fuentes Fache of Spain were in the women's duets synchronised swimming free routine preliminary.

Mark J. Terrill/AP

Natalia Ischenko and Svetlana Romanshina of Russia were in the women's duet synchronized swimming preliminary round.

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Spain's Andrea Fuentes Fache and Ona Carbonell Ballestero took to the water in the duets free routine preliminary round.

Michael Dalder/REUTERS

Mexico's Isabel Delgado Plancarte and Nuria Diosdado Garcia participated in the synchronised swimming duets free routine qualification round.

Daniel Ochoa De Olza/AP

Ethiopia's Genzebe Dibaba was helped off the track after an injury in a women's 1500 meter heat.

Grigory Dukor/REUTERS

Uzbekistan's Ruslan Nurudinov reacted after failing a lift in the men's 105 kg weightlifting clean and jerk competition.

Hassan Ammar/AP

Walid Bidani of Algeria reacted during men's 105 kg weightlifting competition.