Mikhail Kukushkin Pictures
INDIAN WELLS, CA - MARCH 11: Mikhail Kukushkin of Kazahkstan plays a backhand against John Isner of the United States in their second round match during day six of the BNP Paribas Open at Indian Wells Tennis Garden on March 11, 2017 in Indian Wells, California. (Photo by Clive Brunskill/Getty Images)