Andy Murray defeats Novak Djokovic to win ATP World Tour Finals title and seal world number one spot

Britain's ace Andy Murray defeated Novak Djokovic 6-3, 6-4 on Sunday to clinch his first title at the ATP World Tour finals, and maDE sure he remained No. 1 until next season.

The Wimbledon champion needed to win the final match of the season to ensure his place at the top. And he did it, rather easily. 

I'm aware that's going to be extremely difficult because I had a great year this year. I only managed to do it by one match.'' 

Murray replaced Djokovic as the top-ranked player in Paris, but the second-ranked Serb could have regained the No. 1 position by winning Sunday at the O2 Arena. 

And Murray seemed vulnerable heading into the final, especially after playing three sets against Milos Raonic in Saturday's semifinals. He started against Djokovic with a pair of double-faults in the opening game, but it was soon his opponent that was struggling with his serve as the unforced errors piled up. 

There was no serious chance for me to win today's match,'' Djokovic said.From the very beginning we could see that. He was just a better player all in all.'