KEY BISCAYNE, FL - MARCH 25: Andrey Rublev of Russia returns a shot against Tomas Berdych of the Czech Republic during day 6 of the Miami Open at Crandon Park Tennis Center on March 25, 2017 in Key Biscayne, Florida. (Photo by Al Bello/Getty Images)
KEY BISCAYNE, FL - MARCH 25: Andrey Rublev of Russia returns a shot against Tomas Berdych of the Czech Republic during day 6 of the Miami Open at Crandon Park Tennis Center on March 25, 2017 in Key Biscayne, Florida. (Photo by Al Bello/Getty Images)