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PARIS, FRANCE - MAY 26: Dominic Thiem of Austria serves during the Men's Singles second round match against Guillermo Garcia-Lopez of Spain on day five of the 2016 French Open at Roland Garros on May 26, 2016 in Paris, France. (Photo by Dennis Grombkowski/Getty Images)

PARIS, FRANCE - MAY 26:  Dominic Thiem of Austria serves during the Men's Singles second round match against Guillermo Garcia-Lopez of Spain on day five of the 2016 French Open at Roland Garros on May 26, 2016 in Paris, France.  (Photo by Dennis Grombkowski/Getty Images)