LONDON, ENGLAND - JUNE 24:  Serena Williams of U.S. takes a tumble as she tries to return a shot to her compatriot Anna Tatishvili during their Ladies' Singles first round match on day two of the Wimbledon Lawn Tennis Championships at the All England Lawn Tennis and Croquet Club at Wimbledon on June 24, 2014 in London, England. (Photo by Yunus Kaymaz/Anadolu Agency/Getty Images)