see more

PARIS, FRANCE - MAY 30: Stan Wawrinka of Switzerland plays a backhand during the mens singles first round match against Jozef Kovalik of Slovaklia on day three of the 2017 French Open at Roland Garros on May 30, 2017 in Paris, France. (Photo by Adam Pretty/Getty Images)

PARIS, FRANCE - MAY 30:  Stan Wawrinka of Switzerland plays a backhand during the mens singles first round match against Jozef Kovalik of Slovaklia on day three of the 2017 French Open at Roland Garros on May 30, 2017 in Paris, France.  (Photo by Adam Pretty/Getty Images)