London: Roger Federer was two points away from beating one of his fiercest rivals without dropping a solitary game but said he was happy not to beat Andy Murray 6-0 6-0 on Thursday.
The Swiss great was leading 6-0 5-0 and 30-0 on the hapless Murray`s serve when he missed a routine volley and the Briton dug deep to register on the giant scoreboard at the O2 Arena.
Federer completed the demolition in the following game for a 6-0 6-1 victory that sealed top spot in the group with the Swiss having already booked a spot in the last four of the ATP World Tour Finals for the 12th time in 13 appearances.
Anyone who witnessed the way he dismantled Murray, a player he shared an 11-11 career head-to-head with prior to Thursday`s clash, would tip him to claim a seventh year-end title.
Federer said it was an almost perfect performance, but he was not too upset at losing the penultimate game.
"Yeah, not so cool because I wouldn`t want to be in that position," the 17-times grand slam champion told reporters.
"I was happy to get it done. At the end I was happy I didn`t win the second to last game to be quite honest.
"It`s uncomfortable. I don`t know. I don`t like it."
Federer is the only player to win 6-0 6-0 in the history of the tournament -- in 2005 against Gaston Gaudio in Shanghai -- and his emphatic victory on Thursday continued the run of one-sided group matches at this year`s version in London.
World number one Novak Djokovic beat Marin Cilic 6-1 6-1 and Stanislas Wawrinka battered Tomas Berdych by the same score.
Nine of the 10 round-robin matches have been won in straight sets and Federer reckons he knows why.
"I think the surface here doesn`t forgive much," the 33-year-old said of the blue indoor court installed at the 17,000-capacity arena. "I think if there`s a slight difference of the level from the baseline, it`s hard to get out of it.
"We`ve seen it all week. If there`s a bit too big of a gap between the two players, next thing you know, it`s a blowout."
Federer, who will almost certainly end the year ranked number two behind Serbia`s Djokovic, hopes his current level can continue for another 10 days -- long enough to win the title here and lead Switzerland to Davis Cup glory.
"Haven`t won anything yet," said this year`s Wimbledon runner-up. "It all looks very nice right now as we speak, but who knows in the next 10 days how bad it`s going to get.
"Moods change very quickly. I`m unbelievably happy how the round robin has gone because I did expect it to be much tougher than it ended up being.
"But this is now the business end. This is where I want to play my best and finish already a very good season."