INDIAN WELLS, Calif. (AP) – No. 1 Roger Federer and No. 2 Lleyton Hewitt won in straight sets Tuesday to advance in the Pacific Life Open.

Federer, winning for the 22nd time in 23 matches this year, defeated Gilles Muller 6-3, 6-2 to move into the fourth round.

Hewitt had a slightly more difficult time, beating Michael Llodra 6-2, 7-6 (3).

On the women’s side, former No. 1 Kim Clijsters continued her comeback from a wrist injury by defeating Evgenia Linetskaya 6-2, 6-1 in their fourth-round match. No. 5 Elena Dementieva advanced with a 2-6, 6-4, 6-4 victory over Tatiana Golovin.

Federer, the men’s defending champion, said he took his usual approach to the match against Muller – believing it was going to be a tough one.

“When I go into a match, that’s what I think about, even though maybe I’m the big favorite and my opponent hasn’t played many of the big matches on big courts around the world,” Federer said.

Although Muller was no match for the 23-year-old Swiss star, the 21-year-old player from Luxembourg is considered one on the rise. The left-hander vaulted from 189th to No. 68 in the rankings last year. He was the world’s No. 1 junior in 2001.

Hewitt, the Indian Wells champion in 2002 and 2003, was knocked out in the third round by Juan Ignacio Chela last year. Hewitt has won 21 of the 26 matches he’s played in the desert tournament.

He was generally pleased with his play against Llodra.

“The first set I was in total control, so there wasn’t a whole heap of pressure serving out the first set,” Hewitt said. “The second set, obviously I played a good tiebreak. He definitely picked up his game, though, in the second set.”

AP-ES-03-15-05 2016EST