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PARIS, FRANCE - JUNE 09: Stan Wawrinka of Switzerland reacts during his semi-final match with Andy Murray of Great Britain, on day thirteen at Roland Garros on June 9, 2017 in Paris, France. (Photo by Ian MacNicol/Getty Images)

PARIS, FRANCE - JUNE 09: Stan Wawrinka of Switzerland reacts during his semi-final match with Andy Murray of Great Britain, on day thirteen at Roland Garros on June 9, 2017 in Paris, France. (Photo by Ian MacNicol/Getty Images)

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PARIS, FRANCE - JUNE 09: Stan Wawrinka of Switzerland reacts after winning the men's singles semi finals match against Andy Murray of Great Britain on day thirteen of the 2017 French Open at Roland Garros on June 9, 2017 in Paris, France. (Photo by Aurelien Meunier/Getty Images)

PARIS, FRANCE - JUNE 09:  Stan Wawrinka of Switzerland reacts after winning the men's singles semi finals match against Andy Murray of Great Britain on day thirteen of the 2017 French Open at Roland Garros on June 9, 2017 in Paris, France.  (Photo by Aurelien Meunier/Getty Images)

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PARIS, FRANCE - JUNE 09: Stan Wawrinka of Switzerland plays a backhand during mens singles semi-final match against Andy Murray of Great Britain on day thirteen of the 2017 French Open at Roland Garros on June 9, 2017 in Paris, France. (Photo by Adam Pretty/Getty Images)

PARIS, FRANCE - JUNE 09:  Stan Wawrinka of Switzerland plays a backhand during mens singles semi-final match against Andy Murray of Great Britain on day thirteen of the 2017 French Open at Roland Garros on June 9, 2017 in Paris, France.  (Photo by Adam Pretty/Getty Images)