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INDIAN WELLS, CA - MARCH 13: Jozef Kovalik of Slovakia returns a shot by Dominic Thiem of Austria during the BNP Paribas Open at the Indian Wells Tennis Garden on March 11 at Indian Wells Tennis Garden on March 12, 2016 in Indian Wells, California (Photo by Sean M. Haffey/Getty Images)

INDIAN WELLS, CA - MARCH 13:  Jozef Kovalik of Slovakia returns a shot by Dominic Thiem of Austria during the BNP Paribas Open at the Indian Wells Tennis Garden on March 11 at  Indian Wells Tennis Garden on March 12, 2016 in Indian Wells, California  (Photo by Sean M. Haffey/Getty Images)