KEY BISCAYNE, FL - APRIL 01: Alexander Zverev breaks his racket in frustration and throws it dangerously into the crowd. John Isner (USA) defeats Alexander Zverev (GER) 67(4) 64 64 in the Mens Final at the Miami Open held at the Crandon Park Tennis Center on April 1, 2018 in Key Biscayne, Florida   People:  Alexander Zverev - Stock Image
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