Rafael Nadal of Spain returns the ball to Teymuraz Gabashvili of Russia during their match of the Monte Carlo Tennis Masters tournament in Monaco, Wednesday, April 16, 2014. Nadal won 6-4 6-1. (AP Photo/Michel Euler)
Novak Djokovic, of Serbia, drops to the court as he celebrates after defeating Rafael Nadal, of Spain, 6-3, 6-3 during the men's final match at the Sony Open Tennis tournament onSunday, March 30, 2014, in Key Biscayne, Fla. (AP Photo/Wilfredo Lee)