MELBOURNE, AUSTRALIA -- Justine Henin ran her winning streak to 31 matches Friday, overcoming serving troubles to hold off 25th-seeded Francesca Schiavone 7-5, 6-4 in the third round of the Australian Open.

The top-ranked Belgian star will face Aravene Rezai or Hsieh Su-wei in the fourth round, and a quarterfinal against Maria Sharapova looms.

"I hate to look too far," Henin said. "I just want to get ready, improve my game and be in my best shape. I know the draw, but I like to stay concentrated on myself."

After retiring from the 2006 Australian final against Amelie Mauresmo because of a stomach illness, Henin skipped the event last year because she was going through a divorce.

She has dominated the women's tour since returning, finishing 63-4, including two majors and the season-ending championship in 2007, and adding the Sydney International title last week to build up for Melbourne Park.

She got only 48 percent of her first serves into play and was lucky it didn't cost her more against Schiavone, who has a similar style.

"It was really exciting. I'm glad to win in two," Henin said. "She's always given me trouble in the past, so it was a tough third round for me."

Henin controlled the crucial points better than Schiavone, who frequently screamed or covered her face after mistakes.

Marcos Baghdatis downed 2005 champion Marat Safin 6-4, 6-4, 2-6, 3-6, 6-2 in a momentum-swinging match that stretched into Friday morning and completed the second round.

Safin was the last player to beat top-ranked Roger Federer in Melbourne, breaking up the Swiss star's four Australian titles with a semifinal upset three years ago.

Baghdatis is one of three losing Australian Open finalists still in contention -- a list that will certainly be reduced in the third round. He will play 2005 runner-up Lleyton Hewitt next.

Fernando Gonzalez, who lost last year's championship match, beat South Korean Lee Hyung-taik 4-6, 6-3, 6-2, 6-4.

Federer has reached the finals of the last 10 Grand Slam tournaments and won eight of them, losing twice to Rafael Nadal at the French Open.

Nadal and Roddick are into the third round and playing later Friday. Nadal faces No. 28 Simon Gilles and sixth-seeded Roddick is against Philipp Kohlschreiber in a night match.

Last year's two women's finalists were to follow each other, with defending champion Serena Williams facing No. 26 Victoria Azarenka and fifth-seeded Maria Sharapova facing Elena Vesnina.