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PARIS, FRANCE - MAY 23: Kei Nishikori of Japan hits a backhand during the Men's Singles first round match against Simone Bolelli of Italy on day two of the 2016 French Open at Roland Garros on May 23, 2016 in Paris, France. (Photo by Dennis Grombkowski/Getty Images)

PARIS, FRANCE - MAY 23:  Kei Nishikori of Japan hits a backhand during the Men's Singles first round match against Simone Bolelli of Italy  on day two of the 2016 French Open at Roland Garros on May 23, 2016 in Paris, France.  (Photo by Dennis Grombkowski/Getty Images)