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NEW YORK, NY - SEPTEMBER 01: Joao Sousa of Portugal celebrates during the men's singles third round match against Lucas Pouille of France on Day Six of the 2018 US Open at the USTA Billie Jean King National Tennis Center on September 1, 2018 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Sarah Stier/Getty Images)

NEW YORK, NY - SEPTEMBER 01:  Joao Sousa of Portugal celebrates during the men's singles third round match against Lucas Pouille of France on Day Six of the 2018 US Open at the USTA Billie Jean King National Tennis Center on September 1, 2018 in the Flushing neighborhood of the Queens borough of New York City.  (Photo by Sarah Stier/Getty Images)