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NEW YORK, NY - SEPTEMBER 04: Lucas Pouille of France shakes hands after defeating Rafael Nadal of Spain during his fourth round Men's Singles match on Day Seven of the 2016 US Open at the USTA Billie Jean King National Tennis Center on September 4, 2016 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Andy Lyons/Getty Images)

NEW YORK, NY - SEPTEMBER 04:  Lucas Pouille of France shakes hands after defeating Rafael Nadal of Spain during his fourth round Men's Singles match on Day Seven of the 2016 US Open at the USTA Billie Jean King National Tennis Center on September 4, 2016 in the Flushing neighborhood of the Queens borough of New York City.  (Photo by Andy Lyons/Getty Images)