LONDON, ENGLAND - JULY 04:  Grigor Dimitrov of Bulgaria lies flat out after slipping over during his Gentlemen's Singles semi-final match against Novak Djokovic of Serbia on day eleven of the Wimbledon Lawn Tennis Championships at the All England Lawn Tennis and Croquet Club on July 4, 2014 in London, England.  (Photo by Clive Brunskill/Getty Images)