INDIAN WELLS, CA - MARCH 11: Lleyton Hewitt of Australia questions the challenge camera system's upholding a challenge by Stanislas Wawrinka of Switzerland during day 6 of the BNP Paribas Open at Indian Wells Tennis Garden on March 11, 2013 in Indian Wells, California. (Photo by Stephen Dunn/Getty Images). (Photo by Stephen Dunn/Getty Images)
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