Key Biscayne, FL - March 30:  Rafael Nadal, of Spain, returns the ball to Novak Djokovic, of Serbia, during the Sony Open Tennis in Key Biscayne, Fla., Sunday, March 30, 2014.  Rafael Nadal was defeated by Novak Djokovic 6-3, 6-4.  (Photo: Don Edgar)

Key Biscayne, FL - March 30:  Rafael Nadal, of Spain, returns the ball to Novak Djokovic, of Serbia, during the Sony Open Tennis in Key Biscayne, Fla., Sunday, March 30, 2014.  Rafael Nadal was defeated by Novak Djokovic 6-3, 6-4.  (Photo: Don Edgar)

Key Biscayne, FL - March 30:  Rafael Nadal, of Spain, returns the ball to Novak Djokovic, of Serbia, during the Sony Open Tennis in Key Biscayne, Fla., Sunday, March 30, 2014.  Rafael Nadal was defeated by Novak Djokovic 6-3, 6-4.  (Photo: Don Edgar)

Key Biscayne, FL - March 30:  Novak Djokovic, of Serbia, returns the ball to Rafeal Nadal, of Spain, during the Sony Open Tennis Sunday, March 30, 2014, in Key Biscayne, Fla. Novak Djokovic defeated Rafael Nadal to win his fourth Sony Open Tournment 6-3, 6-4. (Photo: Don Edgar)

Key Biscayne, FL - March 30:  Rafael Nadal, of Spain, returns the ball to Novak Djokovic, of Serbia, during the Sony Open Tennis in Key Biscayne, Fla., Sunday, March 30, 2014.  Rafael Nadal was defeated by Novak Djokovic 6-3, 6-4.  (Photo: Don Edgar)

Key Biscayne, FL - March 30:  Novak Djokovic, of Serbia, returns the ball to Rafeal Nadal, of Spain, during the Sony Open Tennis Sunday, March 30, 2014, in Key Biscayne, Fla. Novak Djokovic defeated Rafael Nadal to win his fourth Sony Open Tournment 6-3, 6-4. (Photo: Don Edgar)

Key Biscayne, FL - March 30:  Novak Djokovic, of Serbia, returns the ball to Rafeal Nadal, of Spain, during the Sony Open Tennis Sunday, March 30, 2014, in Key Biscayne, Fla. Novak Djokovic defeated Rafael Nadal to win his fourth Sony Open Tournment 6-3, 6-4. (Photo: Don Edgar)

Key Biscayne, FL - March 30:  Rafael Nadal, of Spain, returns the ball to Novak Djokovic, of Serbia, during the Sony Open Tennis in Key Biscayne, Fla., Sunday, March 30, 2014.  Rafael Nadal was defeated by Novak Djokovic 6-3, 6-4.  (Photo: Don Edgar)

Key Biscayne, FL - March 30:  Novak Djokovic, of Serbia, reacts to the crowd after defeating Rafeal Nadal, of Spain, 6-3, 6-4 for the Sony Open Tennis tournament, Sunday, March 30, 2014, in Key Biscayne, Fla.  (Photo: Don Edgar)

Key Biscayne, FL - March 30:  Novak Djokovic, of Serbia, and Rafael Nadal, of Spain exchange words at the award ceremony after Novak Djokovic defeated Rafeal Nadal 6-3, 6-4 for the Sony Open Tennis tournament, Sunday, March 30, 2014, in Key Biscayne, Fla.  (Photo: Don Edgar)

Key Biscayne, FL - March 30:  Novak Djokovic, of Serbia, poses for photos holding his winner's trophy after defeating Rafeal Nadal, of Spain, 6-3, 6-4 for the Sony Open Tennis tournament, Sunday, March 30, 2014, in Key Biscayne, Fla.  (Photo: Don Edgar)

Key Biscayne, FL - March 30:  Novak Djokovic of Serbia jumps for the photographers on Crondon Park Beach on Key Biscayne after winning the 2014 Sony Open Tennis
Sunday March 30, 2014 on Key Biscayne, FL.  Novak Djokovic of Serbia defeated Rafael Nadal 6-3, 6-4. (Photo: Don Edgar)

Key Biscayne, FL - March 30:  Novak Djokovic of Serbia jumps for the photographers on Crondon Park Beach on Key Biscayne after winning the 2014 Sony Open Tennis
Sunday March 30, 2014 on Key Biscayne, FL.  Novak Djokovic of Serbia defeated Rafael Nadal 6-3, 6-4. (Photo: Don Edgar)