Roger Federer again wins.

Grand Slam Cup tennis tournament winner swiss Roger Federer also won his third match in London, defeating Mardy Fish 6-1, 3-6, 6-3, on Nov. 25, continuing his impressive run at the ATP World Tour Finals.

"I've played Mardy a few times and he's always very dangerous," said Roger after the match. "He takes the ball extremely early, serves great and can get on roll. I was worried in the third set. I thought I was going to lose today but I'm very happy. It's been a great run since the US Open. I've been all round the world but I'm still going strong. Hopefully I can make it a nice weekend."

Roger started the match with the same kind of efficiency that helped him beat Rafael Nadal in just 60 minutes on Tuesday. Our champ had three breaks in the first set. In the second set, Fish found his rhythm and played strong at the net, finally holding his nerve to seal the set. But Roger immediately took control of the deciding set by breaking Fish for a 2-0 lead and closed out the match in an hour and 47 minutes.
Roger will now play the runner-up from Group A in Saturday's semi-final.