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INDIAN WELLS, CA - MARCH 16: Stan Wawrinka of Switzerland looks down in his match against David Goffin of Belgium during day ten of the BNP Paribas Open at Indian Wells Tennis Garden on March 16, 2016 in Indian Wells, California. (Photo by Julian Finney/Getty Images)

INDIAN WELLS, CA - MARCH 16:  Stan Wawrinka of Switzerland looks down in his match against David Goffin of Belgium during day ten of the BNP Paribas Open at Indian Wells Tennis Garden on March 16, 2016 in Indian Wells, California.  (Photo by Julian Finney/Getty Images)