World number one Roger Federer is looking forward to the chance for revenge over home favourite Andy Murray in the ATP World Tour Finals in London on Tuesday.

Federer suffered a costly defeat to Murray in the group stage of the end-of-season event when it was held in Shanghai last year. The Swiss star was eliminated from the tournament as a result of that 6-4, 6-7, 5-7 loss - ending his two-year reign as Tour Finals champion.

It was not the first time that Murray had upset Federer - the Scot holds a 6-3 career winning record against arguably the greatest player of all time, although the Wimbledon and French Open champion won their last meeting in Cincinnati.

Federer has a chance to get his own back on Murray for that Shanghai loss by beating the British number one when they meet again in their Group A clash at the O2 Arena.

"Obviously I expect a difficult match. It's always fun playing your fellow rivals. I think Andy has been one of the guys I played the most," Federer said.

"From Shanghai last year, I remember I was not going into the match with the highest of hopes. 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.

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