Roger Federer to 'manage' aggression at US Open

Roger Federer knows his "all-out attack" approach will need to change as he makes his way through the US Open.

The Swiss maestro was at his best in a 6-1 6-2 6-1 thrashing of Steve Darcis in the second round on Thursday.

Federer mixed up his game, but his aggression saw him finish with 46 winners on Arthur Ashe Stadium.

The 17-time grand slam champion is happy with his start to the year's final major, but said his approach would need to be altered as the event goes on.

"I think this year is another good year. Doing the right things on the court," Federer said.

"Like you said, it was pretty on the easier side, you know, so I was able to mix it up, was attacking, was also staying back some.

"I was pretty much all-out attack as much as I could.

"Obviously I have to manage that against different players when the scoreline isn't maybe so one-sided."

Along with his remarkable half-volley returns of serve, Federer's aggression has included more net approaches.

The 34-year-old has won 34 net points in his opening two rounds and said he hoped serving and volleying, and chipping and charging, could have its place in the sport.

"It would be nice to see more players doing it 'cause I think the mix of the different players and characters of those kind of players makes it cool and fun to watch," Federer said.

"Not that these unbelievable baseline rallies are not cool, but it is nice to see a guy at net and a guy trying to pass, a good net player.

"It's always been a fantastic thing, like [Pete] Sampras and [Andre] Agassi is one of those classics, or [John] McEnroe and [Bjorn] Borg. It was epic to watch those guys play against each other.

"The good thing for me is that I saw that play growing up. Sometimes I did it myself and sometimes people did it against me. It's something I feel comfortable doing and something also comfortable to defend against.

"I've always actually enjoyed that kind of a play. I'm obviously clearly quite happy that I'm able to bring it back to some extent and that it's actually working."