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INDIAN WELLS, CALIFORNIA - MARCH 12: John Isner of the United States serves against Guido Pella of Argentina during their men’s singles third round match on Day 9 of the BNP Paribas Open at the Indian Wells Tennis Garden on March 12, 2019 in Indian Wells, California. (Photo by Yong Teck Lim/Getty Images)

INDIAN WELLS, CALIFORNIA - MARCH 12: John Isner of the United States serves against Guido Pella of Argentina during their men’s singles third round match on Day 9 of the BNP Paribas Open at the Indian Wells Tennis Garden on March 12, 2019 in Indian Wells, California. (Photo by Yong Teck Lim/Getty Images)
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