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PARIS, FRANCE - JUNE 5: Stan Wawrinka of Switzerland on day 9 of the 2017 French Open, second Grand Slam of the season at Roland Garros stadium on June 5, 2017 in Paris, France. (Photo by Jean Catuffe/Getty Images)

PARIS, FRANCE - JUNE 5: Stan Wawrinka of Switzerland on day 9 of the 2017 French Open, second Grand Slam of the season at Roland Garros stadium on June 5, 2017 in Paris, France. (Photo by Jean Catuffe/Getty Images)