KEY BISCAYNE, FL - MARCH 31: Nick Kyrgios of Australia stretches for a shot against Roger Federer of Switzerland in the semi finals at Crandon Park Tennis Center on March 31, 2017 in Key Biscayne, Florida. (Photo by Julian Finney/Getty Images)
KEY BISCAYNE, FL - MARCH 31: Nick Kyrgios of Australia stretches for a shot against Roger Federer of Switzerland in the semi finals at Crandon Park Tennis Center on March 31, 2017 in Key Biscayne, Florida. (Photo by Julian Finney/Getty Images)