MELBOURNE, Australia – The delayed preparation is working well for Maria Sharapova so far at the Australian Open, where she has reached the third round after just two hours on court.

The 2008 Australian Open winner had a 6-0, 6-1 second-round win over U.S. qualifier Jamie Hampton in 64 minutes on Thursday, two days after beating Argentina’s Gisela Dulko by the same margin.

On the men’s side, No. 2 Rafael Nadal advanced without much trouble from his injured right knee or from German veteran Tommy Haas in a 6-4, 6-3, 6-4 win. Four-time champion Roger Federer didn’t even need to pick up a racket because Andreas Beck withdrew from their second-round match.

Sharapova did not play in any warmup events and spent nearly two weeks in Melbourne ahead of the season’s first major as she rested an injured left ankle.

There was no indication of any problems with the ankle on Thursday, but the 24-year-old Russian wasn’t really tested by No. 144-ranked Hampton, who has only ever won one match at a Grand Slam.

“It was more about getting my feet going … worrying about myself,” Sharapova said. “Yeah, started my preparations in the offseason a little late, took a bit of extra time in practice instead of rushing into a tournament.”

She’ll meet either Stephanie Dubois of Canada or 30th-seeded Angelique Kerber of Germany in the next round.

Seventh-seeded Vera Zvonareva, a two-time semifinalist at Melbourne Park, had a 6-1, 7-6 (3) over Lucie Hradecka. No. 21 Ana Ivanovic also advanced, beating Dutch player Michaella Krajicek 6-2, 6-3.

Sharapova is one of three former champions still in contention. Serena Williams was bidding to extend her winning streak to 16 matches at Melbourne Park when she played Barbora Zahlavova Strycova in the subsequent match on Rod Laver Arena.

Defending champion Kim Clijsters is into the third round on the other half of the draw.

Top-ranked Caroline Wozniacki is aiming for her first major title, and is one of four women in the draw who can finish the tournament at No. 1.

She beat Anna Tatishvili 6-1, 7-6 (4) in the second round Wednesday.

Wozniacki will play a third-round match against No. 31 Monica Niculescu. A win could put her on course for a quarterfinal match against Clijsters, who routed Stephanie Foretz Gacon of France 6-0, 6-1.

The top-ranked American man bowed out when No. 8 Mardy Fish lost to Alejandro Falla of Colombia 7-6 (4), 6-3, 7-6 (6). But No. 16 John Isner survived a five-setter to beat former Wimbledon finalist David Nalbandianw.

Andy Roddick was scheduled to play the last match Thursday against Lleyton Hewitt.