Andy Murray worried future ATP Tour schedule will be too demanding

British No 1 Andy Murray has raised concerns over the demands of the ATP Tour schedule should the World Tour Finals leave London after 2013.

US Open champion Murray believes that not having a traditional rest week before the season-ending event is making life complicated. He added: "It's probably going to affect a couple of the tournaments, but that's what happens when you take a couple of weeks off the Tour. It's never going to be perfect. "Basel, Valencia (the same week), and Paris and having a week off and then playing the Tour Finals is fine. But it's going to be tough to play all three back to back with obviously most guys' main priority wanting to be fresh for the finals." Murray his dismissed any fitness fears ahead of the Paris Masters and World Tour Finals after taking a two-week break following his Shanghai Masters final defeat to Novak Djokovic. "I had a full week rest after Shanghai, which I needed," said the Olympic champion, who admits that his focus is on the London week after failing to complete a year ago due to injury. "I just started to build up my training gradually. We came here on Friday so I have had pretty decent preparation for the tournament, which is good. "I picked up a bug on the way to Asia and still didn't get rid of it until a few days after I got back. It was important to rest. "Now I feel better coming to Paris than I did last year."