KEY BISCAYNE, FL - MARCH 25: Alexander Zverev of Germany in action against Yen-Hsun Lu of Taipei at Crandon Park Tennis Center on March 25, 2017 in Key Biscayne, Florida. (Photo by Julian Finney/Getty Images)
KEY BISCAYNE, FL - MARCH 25: Alexander Zverev of Germany in action against Yen-Hsun Lu of Taipei at Crandon Park Tennis Center on March 25, 2017 in Key Biscayne, Florida. (Photo by Julian Finney/Getty Images)