After his straight-sets victory over Kei Nishikori in London on Tuesday, six-time ATP Finals champion Roger Federer offered his take on the plethora of one-sided matches at this year’s event.

Video: Federer Shines on Offense, Defense versus Nishikori in London

“I think it's actually quite simple, in my opinion,” Federer told assembled members of the media, “because the court plays somewhat slow, and the serve doesn't have that much of an impact depending on you how back it up.

“I think it's very much a game of movement and the baseline game. Whoever's better from the baseline has the upper hand, then dominates. I think that's why we're seeing heavy scorelines, because it's just hard to get out of—hard to serve your way out of trouble.”

After four days of singles matches, all eight have been decided in straight sets, half of which have seen the loser manage four or less games.

“You need to hit a lot of great shots [to win points],” Federer said, adding: “You have to work extremely hard. I think if you then look at the way Novak [Djokovic] or Stan [Wawrinka] has played here [before their match against each other on Wednesday], I think they both played very well, which made it very difficult for the other guys. Their serve didn't have the impact that we normally know that Cilic's or Berdych's serve can have. From that standpoint, I think the best movers are most likely going to come through here.”

Federer will face Andy Murray on Friday in a match with huge implications for Group B. The pair have split their first 22 career matches, with Federer winning the last two. Federer is currently 2-0 in round-robin play while Murray is 1-1.

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