WIMBLEDON, England -- Saturday was a pretty average day for Andre Agassi.

"I just went to work," said the American after spending a mere 81 minutes arranging his passage into the fourth round of the Wimbledon championships.

Agassi, without trying too hard, thrashed Chilean Nicolas Massu 6-3, 6-1, 6-1.

Australian Lleyton Hewitt took nearly three hours to beat Moroccan Younes El Aynaoui 7-5, 5-7, 6-4, 7-6 (4) in Centre Court's first match of the day.

In virtually the same time, Court One spectators witnessed two women's singles matches and Agassi's one-sided display.

The fans on Court One might well have felt short-changed but Agassi was happy to be going home in daylight.

"No question about it, any time you get through the match you're pretty thrilled about it," the second seed said.

"To go out there and get in control of a match, stay in control of it, not make it any more complicated than it has to be speaks well for how I'm playing."

Hewitt, who has now won his past 15 matches on grass, will play Frenchman Nicolas Escude in the fourth round.

Hewitt, who had won two Davis Cup matches and the Queen's Club and Den Bosch tournaments on grass before Wimbledon, led two sets to one when a cloudburst delayed the match for 33 minutes at 3-2 in the fourth. When they resumed, El Aynaoui saved two break points at 5-5.

But he made a poor start to the tiebreak, losing his first service point and quickly trailed 6-2.

Hewitt, who had lost a fourth-set tiebreak in his thrilling five-set victory against American Taylor Dent on Thursday, squandered his first two match points but a heavy first serve made sure of victory at the third attempt after two hours 51 minutes.

No. 3 Patrick Rafter beat No. 27 Hicham Arazi in straight sets, while Tenth-seeded Thomas Enqvist and 19th-seeded Nicholas Kiefer won. But No. 7 Yevgeny Kafelnikov lost 3-6, 6-1, 6-3, 7-6 (2) to Guillermo Canas, the first Argentine to reach the fourth round since Jose Luis Clerc in 1979. And No. 24 Nicolas Escude beat fellow Frenchman Sebastien Grosjean, seeded ninth.

Tenth-ranked Thomas Enqvist also advanced, but No. 7 Yevgeny Kafelnikov lost 3-6, 6-1, 6-3, 7-6 (2) to Guillermo Canas, the first Argentine to reach the fourth round since Jose Luis Clerc in 1979.

Agassi knows he will have to work harder on Monday, when he faces 19th seed Nicolas Kiefer of Germany.

"Everything kind of felt pretty comfortable (today) but you have to elevate and step it up in the second week," he said. "I have got to make sure I am ready to shift gears.

"Certainly the level of competition is such that you feel like you're playing the best in the world for the biggest title in the world."

Agassi said the current dearth of serve-and-volley players meant the grass was wearing differently on Wimbledon's courts.

"Normally one of the upsides for a baseliner to be in the second week is the grass does slow up and the ball starts bouncing up a little bit more which gives you a better look at it," he said.

"But in years past there were so many serve-volleyers that the ground got incredibly chewed up, especially around mid-court. As the tournament went on the bounces got more unpredictable in the centre of the court.

"But now the grass is getting worn out behind the baseline more than it is in the centre of the court. It will be interesting to see how that all plays out.

"It's going to help those who need a good look at the ball as opposed to those who like to play it out of the air."