Novak Djokovic stunned at The O2 , claiming a straight-sets victory over Roger Federer to claim a record fourth straight ATP World Tour Finals title.

The Serbian broke serve three times to win 6-3 6-4 in just 80 minutes at The O2 in Greenwich.

Djokovic had been defeated by six-time champion Federer in the group stage on Tuesday but proved to be too strong for the Swiss in the final.

“I am enjoying every moment on the court, I cherish every moment after dreaming of it as a kid,” Djokovic told BBC Sport.

He ends the year with three Grand Slams, taking his total to 10 majors.

Federer said: “It is never fun on the not winning side, but it is better than not playing at all like last year. This week was great, there were some crazy points tonight, but like plenty of times this year Novak deserved it.”

As well as a cheque for £1.4million, Djokovic has also got level with Federer at 22-22 in career meetings.

Most of the 17,800 spectators got behind Federer, as he leveled at 3-3, but Djokovic’s second serve was too strong.

“Roland Garros is always one of the biggest challenges I have every year, but it’s not the only one,” said the Serb.

“There are the Olympic Games that are happening every four years. Next year is going to be very condensed in terms of scheduling and in terms of the importance of certain events.

“With the wins that I had this season and throughout my career, especially in the last five years, I put myself in a very good position, knowing that I made a lot of records and history,” said Djokovic.

“I’m convinced with this dedication to the sport, I can achieve more. How much, I don’t know. I don’t have a sense of urgency. I don’t chase anything. I just try to be in the moment and see where it takes me.”