see more

LONDON, ENGLAND - JUNE 30: Kei Nishikori of Japan plays a backhand during the Men's Singles second round match against Julien Benneteau of France on day four of the Wimbledon Lawn Tennis Championships at the All England Lawn Tennis and Croquet Club on June 30, 2016 in London, England. (Photo by Adam Pretty/Getty Images)

LONDON, ENGLAND - JUNE 30:  Kei Nishikori of Japan plays a backhand during the Men's Singles second round match against Julien Benneteau of France on day four of the Wimbledon Lawn Tennis Championships at the All England Lawn Tennis and Croquet Club on June 30, 2016 in London, England.  (Photo by Adam Pretty/Getty Images)