INDIAN WELLS, CA - MARCH 15: John Isner serves to Adrian Maninarino of France during the BNP Paribas Open at the Indian Wells Tennis Garden on March 15, 2016 in Indian Wells, California. (Photo by Matthew Stockman/Getty Images)
INDIAN WELLS, CA - MARCH 15: John Isner serves to Adrian Maninarino of France during the BNP Paribas Open at the Indian Wells Tennis Garden on March 15, 2016 in Indian Wells, California. (Photo by Matthew Stockman/Getty Images)