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AUCKLAND, NEW ZEALAND - JANUARY 09: John Isner of United States plays a shot against Taylor Fritz of United States in their singles match during the 2019 ASB Classic at the ASB Tennis Centre on January 09, 2019 in Auckland, New Zealand. (Photo by Dave Rowland/Getty Images)

AUCKLAND, NEW ZEALAND - JANUARY 09: John Isner of United States plays a shot against Taylor Fritz of United States in their singles match during the 2019 ASB Classic at the ASB Tennis Centre on January 09, 2019 in Auckland, New Zealand. (Photo by Dave Rowland/Getty Images)
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