INDIAN WELLS, CA - MARCH 11: Grigor Dimitrov of Bulgara challenges a call during his match with Ernests Gulbis of Latvia during the BNP Paribas Open at Indian Wells Tennis Garden on March 9, 2014 in Indian Wells, California. Gulbis won 2-6, 6-1, 7-5. (Photo by Stephen Dunn/Getty Images). (Photo by Stephen Dunn/Getty Images)
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