Australia's Nick D'Arcy (R) swims past South Africa's Charl Crous during a training session at the main...
Australia's Nick D'Arcy (R) swims past South Africa's Charl Crous during a training session at the main pool of the Aquatics Centre before the start of the London 2012 Olympic Games in London, July 23, 2012. REUTERS/David Gray (BRITAIN - Tags: SPORT OLYMPICS SPORT SWIMMING)