Rafael Nadal has revealed that this season has been the "most emotional" one of his career so far.
Nadal returned from a serious knee injury to regain his spot at the top of the world rankings and win the French Open and the US Open in a successful year for the Spaniard.
"First thing, I want to say is congratulate a super player like Novak. I wish you the best of luck in the Davis Cup, you deserve it," Nadal said in his post-match interview.
"It's been no doubt the most emotional season of my career. To play the last match in this stadium is a fantastic occasion for me even if I didn't have the chance to win today because I played a fantastic player like Novak."
While Nadal is still waiting for his first success in the season-ending tournament, Djokovic has now won the crown two years in a row.