World Tour Finals to stay in London's O2 until 2015 The prestigious season-ending tournament moved to the O2 Arena in 2009 on a five-year deal and has been a huge success, with more than 750,000 spectators attending over the first three years and unanimous backing from the players. The Scot said at the weekend: "If it does stay here then that's obviously good. I think they do a great job here, they put on an excellent show and everyone seems to enjoy it. Roger Federer also backed London, saying: "If they move they'd better make sure it's a great place, one that makes sense for tennis and for the business and for our schedule. I'm sure that at this point the ATP is going to take the right decision here. World No 1 Novak Djokovic was in favour of moving the tournament, though, believing London has had its turn. The Serb said: "We are very happy but I am one of the players who supports the global promotion of this event and this sport in general so after five years here we should give the opportunity to other cities around the world because in that way we can promote the sport in the best possible way."