Bayern head coach Pep Guardiola of Spain gestures during the German Bundesliga soccer match between Hertha BSC Berlin and Bayern Munich in Berlin, Germany, Tuesday, March 25, 2014. (AP Photo/Michael Sohn)
Kei Nishikori, of Japan, cools off between sets during the match against David Ferrer, of Spain, at the Sony Open Tennis tournament in Key Biscayne, Fla., Tuesday, March 25, 2014. (AP Photo/Alan Diaz)
Tommy Robredo, of Spain, returns to Novak Djokovic at the Sony Open Tennis tournament, Tuesday, March 25, 2014, in Key Biscayne, Fla. (AP Photo/Lynne Sladky)
Novak Djokovic, of Serbia, returns to Tommy Robredo, of Spain, at the Sony Open Tennis tournament, Tuesday, March 25, 2014, in Key Biscayne, Fla. (AP Photo/Lynne Sladky)