Rafael Nadal and Roger Federer claim about ATP World Tour finals made by Greg Rusedski Nadal, 31, has never won the season-ending championships while Federer has done so four times – the last two coming at the O2. The Spaniard pulled out of the Paris Masters today, citing a knee injury, and Rusedski isnt overly convinced he will be ready for London. Rusedski told Sky Sports: He said he was going to look at his health, Ill see what happens, but he wasnt really convincing that he was going to be in London. Historically he doesnt like playing there. Hes spoke many times about it being outdoors or if the end of season championships were on clay. Its not his favourite event to go to. The surface has a little bit lower bounce, its quicker and it suits Roger Federer more than Rafa. Knowing Rafa hes such a professional, hell do everything he can to get ready for the event. But if hes not fit I dont think hell take a chance.. A withdrawal from the Spaniard could play into the hands of players including Juan Martin del Potro, John Isner, Jack Sock and Sam Querrey. Rusedski added: If you look at Del Potro, Isner, Sock, Querrey, they might have a shot to sneak in the back door of the tournament. They better be ready. Knowing Rafa as a professional hell try his best to get there. But if Rafas knees dont feel 100 per cent right, he wont be there..