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KEY BISCAYNE, FL - MARCH 29: Grigor Dimitrov of Bulgaria plays a forehand against Gael Monfils of France in their fourth round match during the Miami Open Presented by Itau at Crandon Park Tennis Center on March 29, 2016 in Key Biscayne, Florida. (Photo by Clive Brunskill/Getty Images)

KEY BISCAYNE, FL - MARCH 29:  Grigor Dimitrov of Bulgaria plays a forehand against Gael Monfils of France in their fourth round match during the Miami Open Presented by Itau at Crandon Park Tennis Center on March 29, 2016 in Key Biscayne, Florida.  (Photo by Clive Brunskill/Getty Images)