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INDIAN WELLS, CA - MARCH 12: Stan Wawrinka of Switzerland plays a forehand in his match against Ilya Marchenko of Ukraine during day six of the BNP Paribas Open at Indian Wells Tennis Garden on March 12, 2016 in Indian Wells, California. (Photo by Julian Finney/Getty Images)

INDIAN WELLS, CA - MARCH 12:  Stan Wawrinka of Switzerland plays a forehand in his match against Ilya Marchenko of Ukraine during day six of the BNP Paribas Open at Indian Wells Tennis Garden on March 12, 2016 in Indian Wells, California.  (Photo by Julian Finney/Getty Images)