LONDON, ENGLAND - JULY 06: Novak Djokovic of Serbia plays a backhand during the Gentlemen's Singles second round match against Adam Pavlasek of the Czech Republic on day four of the Wimbledon Lawn Tennis Championships at the All England Lawn Tennis and Croquet Club on July 6, 2017 in London, England. (Photo by Clive Brunskill/Getty Images)
