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INDIAN WELLS, CA - MARCH 18: Juan Martin Del Potro of Argentina poses with the winner's trophy after defeating Roger Federer of Switzerland during the men's final on Day 14 of the BNP Paribas Open at the Indian Wells Tennis Garden on March 18, 2018 in Indian Wells, California. (Photo by Matthew Stockman/Getty Images)

INDIAN WELLS, CA - MARCH 18:  Juan Martin Del Potro of Argentina poses with the winner's trophy after defeating Roger Federer of Switzerland during the men's final on Day 14 of the BNP Paribas Open at the Indian Wells Tennis Garden on March 18, 2018 in Indian Wells, California.  (Photo by Matthew Stockman/Getty Images)