Scott Parsons of the U.S. competes in the men's kayak (K1) heat at Lee Valley White Water Centre at the London 2012 Olympic Games July 29, 2012. REUTERS/Lucy Nicholson (BRITAIN - Tags: SPORT OLYMPICS SPORT CANOEING)
Spain's David Ferrer plays a shot against Canada's Vasel Pospisil during their men's singles tennis match at the London 2012 Olympic Games at the All England Tennis Club in Wimbledon, southwest London, on July 29, 2012. AFP PHOTO / MIGUEL MEDINA
Germany's Julia Rohde competes on the women's 53Kg Group B weightlifting competition at the London 2012 Olympic Games July 29, 2012. REUTERS/Kai Pfaffenbach (BRITAIN - Tags: OLYMPICS SPORT WEIGHTLIFTING TPX IMAGES OF THE DAY)