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WINSTON SALEM, NORTH CAROLINA - AUGUST 23: Andrey Rublev of Russia returns a shot from Denis Shapovalov of Canada during their quarterfinals match on day seven of the Winston-Salem Open at Wake Forest University on August 23, 2019 in Winston Salem, North Carolina. (Photo by Jared C. Tilton/Getty Images)

WINSTON SALEM, NORTH CAROLINA - AUGUST 23: Andrey Rublev of Russia returns a shot from Denis Shapovalov of Canada during their quarterfinals match on day seven of the Winston-Salem Open at Wake Forest University on August 23, 2019 in Winston Salem, North Carolina. (Photo by Jared C. Tilton/Getty Images)