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KEY BISCAYNE, FL - MARCH 28: Grigor Dimitrov of Bulgaria celebrates celebrates his win over Andy Murray of Great Britain during the Miami Open presented by Itau at Crandon Park Tennis Center on March 28, 2016 in Key Biscayne, Florida. (Photo by Matthew Stockman/Getty Images)

KEY BISCAYNE, FL - MARCH 28:  Grigor Dimitrov of Bulgaria celebrates celebrates his win over Andy Murray of Great Britain during the Miami Open presented by Itau at Crandon Park Tennis Center on March 28, 2016 in Key Biscayne, Florida.  (Photo by Matthew Stockman/Getty Images)