Denis Istomin Pictures

  • LONDON, ENGLAND - AUGUST 01: Denis Istomin of Uzbekistan wipes hie face during a break in play against Roger Federer of Switzerland during the third round of Men's Singles Tennis on Day 5 of the London 2012 Olympic Games at Wimbledon on August 1, 2012 in London, England. (Photo by Clive Brunskill/Getty Images)