Photos: Warren King

WORLD number one, Novak Djokovic, won the Barclays ATP World Tour Finals this evening in front of a capacity crowd at the O2.

The Serb beat the defending champion Roger Federer in a thrilling two set match, taking the win 7-6 7-5 in two hours and 14 minutes.

The season ending win was played out in front of almost 18,000 fans at the North Greenwich venue, with Djokovic collecting a prize purse worth a cool $1,760,000.

Federer was looking to make it three tournament wins in a row, having conquered the O2 in 2010 and 2011, but the Swiss maestro looked the more tired of the two men and couldn't overcome Djokovic.

Tournament extends stay in Greenwich

The Barclays ATP World Tour Finals will stay in Greenwich for at least another three years, it has been announced.

The end of season tournament which pits the top eight male singles and doubles against each other will continue to be staged at the O2 arena until at least 2015.

The tournament has been hosted in 14 cities since it was established in 1970, with New York hosting the most number of times between 1977 and 1989. It was first staged at the O2 in 2009, with Nicolas Davydenko taking the title that year.

Brad Drewett, ATP Executive Chairman and President, said: "We are very happy to announce the extension of our original commitment in London for a further two years...  The excitement created by our season-ending tournament in London has been fantastic, with fans, players, media and commercial partners all supporting the event in an unprecedented manner."

Photo: Warren King

THE TOP eight male tennis players will battle to win the end-of-year tournament at Greenwich's O2 this week.

The Barclays ATP World Tour Finals gets under way tomorrow - the fourth year it has been held at the North Greenwich venue.

Andy Murray gets the action started as he goes up against Thomas Berdych. If Murray can clinch the title, it would cap an incredible year that has also seen him win the US Open and also take the gold medal at London 2012.

Also competing at the tournament will be world number one, Roger Federer, Novak Djokovic, David Ferrer, Juan Martin Del Potro, Jo Wilfried Tsonga and Janko Tipsarevic.

The prize money for the winner stands at $830,000, rising to $1,760,000 if they can go undefeated for the tournament.

Ticket prices for the ATP World Tour Finals start at £20.

ROGER FEDERER has won the Barclays ATP World Tour Finals at the O2 arena in Greenwich.

Federer beat Jo-Wilfried Tsonga 6-3 6-7 6-3 before a capacity crowd at the north Greenwich venue.

Playing in his 100th tournament final, Federer’s thrilling victory gave him the end-of-year championships for a record breaking sixth time.

By mid-way through the second set, Federer looked all set to wrap it up in two but the Frenchman battled back to take the set and give the fans a final, third set after a nerve-wracking tiebreaker.

Tardy spectators including London’s mayor, Boris Johnson, were booed as the umpire had to hurry them to find a seat as play was held up after a change-of-end break during the third set.

Speaking at the presentation ceremony after the match, Tsonga said it was “amazing to play on this court and amazing to be in London with you.”

Federer added: “I don’t think this tournament could be any better run. We’ve had a wonderful time...I really enjoyed every minute of being here.... See you next year, hopefully."

The ATP World Tour Finals return to the O2 in November 2012.

The Barclays ATP World Tour Finals get under way at The O2 arena on Sunday.

The end-of-year spectacular, now in its third year at the North Greenwich venue, sees the top eight male players of 2011 go up against each other.

Andy Murray joins world number one, Novak Djokovic, in Group A along with David Ferrer and Thomas Berdych.

Rafel Nadal, Roger Federer, Jo-Wilfried Tsonga and Mardy Fish make up Group B.

Players go head to head against the other members of their group, with the group-winners and runners-up advancing to the semi finals.

The tournament last throughout the week, with doubles matches daily too, and will conclude next Sunday.

Check ticket availability for the Barclays ATP World Tour Finals

Andy Murray will  play world number one, Rafael Nadal, at the Barclays ATP World Tour Finals at the O2 arena in North Greenwich this afternoon.

Nadal secured top position in Group A after beating Wimbledon finalist, Tomas Berdych, in an impressive straight sets win yesterday afternoon.

Murray and Nadal have already met three times this year with the Scot winning two of those encounters - notably both times they played on a hard surface.

The second semi final will take place tonight between Group B winner, Roger Federer, and Group A runner-up, Novak Djokovic.

The winners of the semi finals will play on Sunday, when the Barclays ATP World Tour Finals 2010 Champion will be crowned.

Find tickets for ATP World Tour Finals at the O2