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LONDON, ENGLAND - JULY 01: Stanislas Wawrinka of Switzerland plays a forehand in his Gentlemens Singles Second Round match against Victor Estrella Burgos of Dominican Republic during day three of the Wimbledon Lawn Tennis Championships at the All England Lawn Tennis and Croquet Club on July 1, 2015 in London, England. (Photo by Ian Walton/Getty Images)

LONDON, ENGLAND - JULY 01:  Stanislas Wawrinka of Switzerland plays a forehand in his Gentlemens Singles Second Round match against Victor Estrella Burgos of Dominican Republic during day three of the Wimbledon Lawn Tennis Championships at the All England Lawn Tennis and Croquet Club on July 1, 2015 in London, England.  (Photo by Ian Walton/Getty Images)