Michael Phelps of the US competes in the men's 100m butterfly heats at the 14th FINA World Championships in Shanghai on July 29, 2011. Reuters / Carlos Barria
WBO welterweight champion Manny Pacquiao (left) takes a left to his face from Juan Manuel Marquez during their title fight at the MGM Grand Garden Arena on Nov 12. John Gurzinski / Agence France-Presse
A contestant competes in the Amateur Women's Classic Bodybuilding competition at the FIBO 2011 in Essen, on April 16. Ina Fassbender/ Reuters
Spain's three-time Tour de France winner Alberto Contador (center) punches a fan dressed up as a doctor as he climbs Alpe d'Huez (1850m) in the 109,5 km, 19th stage of the Tour de France on July 22. Lionel Bonaventure / Agence France-Presse
Red Bull-Renault driver Sebastian Vettel of Germany celebrates his driver's world championship victory on the podium at the Japanese GP on Oct 9. Toshifumi Kitamura / Agence France-Presse
Ducati's Damien Cudlin of Australia crashes out of a practice session of the Australian MotoGP race at Phillip Island on Oct 15. Stephen Piper / Agence France-Presse
Sport is all about highs and lows, pain and gain, and the world's photographers captured that to a tee in 2011
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