Novak Djokovic (L) of Serbia and Roger Federer (R) of Switzerland greet each other during the trophy presentation following the men's final of the BNP Paribas Tennis Open in Indian Wells, California on March 22, 2015.  Djokovic defeated Federer 6-3, 6-7 (5), 6-2.AFP PHOTO / FREDERIC J. BROWN        (Photo credit should read FREDERIC J. BROWN/AFP/Getty Images)