Novak Djokovic has described 2016 as a "very good year", despite losing his position as the world number one to Andy Murray.
Last weekend, Murray dislodged Djokovic from the top of the ATP world rankings - a spot he had held for over two years - but the Serbian remains upbeat ahead of the ATP World Tour Finals in London.
Murray is the marginal favourite to win the end-of-season even,t but Djokovic feels that he is moving closer to a return to his best form as he bids to win the tournament for a sixth time.
The 29-year-old told reporters: "My high standard of results has taken its toll a bit. I didn't get to recover fast after the French Open to compete on the highest level. I had to dig deep and take some time to reflect because it was an incredible achievement.
"It took a bit of time to get back on track but all in all it was a very good year. I've had a good couple of months. It's not been up to the standards of the 12 to 15 months before that but in sport you can't always expect to win.
"I'm here in London to crown this year with the best possible result. I've had an amazing last four years at the O2 Arena."
Djokovic will reclaim the world number one position if he wins the tournament in England's capital.
