Roger Federer has admitted he’s out for revenge when he comes face to face with Andy Murray in the ATP World Tour Finals today.

You’d think the man who this year finally beat Pete Sampras’ record tally of Grand Slams would be above such an aim.

But the Swiss sensation is a man who doesn’t forget, and having lost to the Scot in the group stage of the end-of-season event last year, Federer wants today to be payback time.

That defeat eliminated the world No.1 from the tournament, ending his two-year reign as Tour Finals champion. And Federer doesn’t want to be a loser again when he plays the home hope at the O2 arena in London.

“From Shanghai (where the tournament was then held) last year, I remember I was not going into the match with the highest of hopes,” the Fed Express said.

“I knew I had only a little bit left in the tank because I was sick two days before. “I was injured two or three weeks before.

“So I kind of just said to myself, You know what, I’ll play aggressive and see what happens. “I was playing incredible for a set. I almost got a victory.

But I thought it was a very exciting match to be a part of.

“It was unfortunate for me not to come through.

But I still think the match was great. I hope we can live up to the expectations and play another good one.”

While Federer beat Fernando Verdasco 4-6, 7-5, 6-1 in his first-round match, Murray saw off the challenge of US Open champion Juan Martin del Potro 6-3, 3-6, 6-2.  And even though the super Scot is playing in front of an expectant British crowd, he claims not to feel any more tension than usual.

“I don’t think there’s any more pressure on me. It’s just different to Wimbledon,” Murray said.