Petra Cetkovska Pictures

  • LONDON, ENGLAND - JULY 30: Petra Cetkovska of Czech Republic retires from the match injured after receiving treatment for an injury during the Women's Singles Tennis match against Angelique Kerber of Germany on Day 3 of the London 2012 Olympic Games at the All England Lawn Tennis and Croquet Club in Wimbledon on July 30, 2012 in London, England. (Photo by Clive Brunskill/Getty Images)