LONDON, ENGLAND - AUGUST 03: (L-R) Roger Federer of Switzerland is congratulated by Juan Martin Del Potro of Argentina after his 4-6, 7-6, 19-17 win in the Semifinal of Men's Singles Tennis on Day 7 of the London 2012 Olympic Games at Wimbledon on August 3, 2012 in London, England. (Photo by Clive Brunskill/Getty Images)
