INDIAN WELLS, CA - MARCH 15:  Novak Djokovic of Serbia celebrates after breaking serve and going ahead 5-1 in the third set against John Isner during the BNP Paribas Open at Indian Wells Tennis Garden on March 15, 2014 in Indian Wells, California. Djokovic won 7-5, 6-7 (2), 6-1.  (Photo by Stephen Dunn/Getty Images)