New York: Five-time champion Roger Federer raced into the third round of the US Open on Thursday with a 6-3, 6-2, 6-2 victory over Israeli Dudi Sela.

Federer didn't face a break point in the 77-minute encounter, earning his fifth break of the match in penultimate game and serving it out without fuss.

"It's always a huge advantage when you're serving well," Federer said. "I was really hitting my spots well today. It was actually quite breezy, that's why I'm particularly happy about it."

After schooling the 93rd-ranked Sela, Federer was prompted to give a little serving clinic to the Arthur Ashe stadium crowd.

The Swiss great stressed the importance of the ball toss, and advised gripping the racquet lightly "like a hammer".

Federer next faces 27th-seeded Croatian Marin Cilic, who notched a comfortable 6-1, 6-0, 6-2 victory over 18-year-old Australian Bernard Tomic, the youngest player left in the men's draw.

Cilic was happy to get past the youngster in three sets, after he was extended to five sets by Tomic at the Australian Open in January.

"He has some different things in his game," Cilic said. "It's really important not to let things turn around. Any moment he can get his momentum back."

The 22-year-old, ranked 28th in the world, was looking forward to a shot at Federer. The Swiss star has won both of their prior encounters, most recently at Monte Carlo this year.

"Definitely to play against Roger at a Grand Slam takes a little something else," said Cilic, who reached the quarter-finals here in 2009.

But he thinks he learned some things from the meeting in Monte Carlo.

"I feel well and that I can challenge him," he said.

Federer said Cilic would offer a far different challenge from Sela.

"My next opponent will be much taller than the player I played today, that changes everything," Federer said, who anticipated a tougher defensive battle.

"But I was very happy with today. I've got a day of practice tomorrow, I can work on a few things, hopefully I can play even better the next match."

Federer, seeded third behind surging world number one Novak Djokovic and defending champion Rafael Nadal, has had a modest season by his standards, with just one title, in Doha.

He hasn't won a major since the 2010 Australian Open, and this year's US Open is his last chance to extend his streak of eight years with at least one major title.