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INDIAN WELLS, CA - MARCH 11: Artist Mike Sullivan and tournament CEO Raymond Moore pose with Novak Djokovic of Serbia in front of a mural in his likeness unveiled during the BNP Paribas Open at the Indian Wells Tennis Garden on March 11, 2016 in Indian Wells, California. (Photo by Matthew Stockman/Getty Images)

INDIAN WELLS, CA - MARCH 11: Artist Mike Sullivan and tournament CEO Raymond Moore pose with Novak Djokovic of Serbia in front of a mural in his likeness unveiled during the BNP Paribas Open at the Indian Wells Tennis Garden on March 11, 2016 in Indian Wells, California.  (Photo by Matthew Stockman/Getty Images)