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Switzerland's Stanislas Wawrinka reacts during the men's final tennis match against Spain's Rafael Nadal at the Roland Garros 2017 French Open on June 11, 2017 in Paris. / AFP PHOTO / Eric FEFERBERG (Photo credit should read ERIC FEFERBERG/AFP/Getty Images)

Switzerland's Stanislas Wawrinka reacts during the men's final tennis match against Spain's Rafael Nadal at the Roland Garros 2017 French Open on June 11, 2017 in Paris.  / AFP PHOTO / Eric FEFERBERG        (Photo credit should read ERIC FEFERBERG/AFP/Getty Images)