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Tuesday, January 17, 2012
Updated: January 18, 9:36 PM ET
Caroline Wozniacki survives in Australia

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MELBOURNE, Australia -- Top-seeded Caroline Wozniacki stayed on track to keep her No. 1 ranking in women's tennis with a 6-1, 7-6 (4) win over Anna Tatishvili of Georgia in the second round of the Australian Open on Wednesday.

Wozniacki rallied from 4-1 down in the second set and needed a medical timeout at 4-5 to get treatment for a blister on her left big toe. The Danish player saved one set point in the 10th game and forced a tiebreaker, which she won when Tatishvili sprayed a forehand wide.

Wozniacki needs to reach the quarterfinals to have a chance of staying at No. 1, a ranking she held for all but one week in 2011.

Earlier, defending champion Kim Clijsters cruised into the third round, then showed just how much support she has at Rod Laver Arena by getting the crowd to sing "Happy Birthday" to her younger sister.

Clijsters only needed 47 minutes to beat Stephanie Foretz Gacon of France 6-0, 6-1 on Wednesday, conceding just 10 points in the first set and showing no signs of a hip problem that forced her to retire during a semifinal against Daniela Hantuchova at a warm-up tournament two weeks ago.

She will meet Hantuchova in the next round here, and has a potential rematch of the 2011 Australian Open final with Li Na in the fourth.

Clijsters and No. 20 Hantuchova, a 4-6, 6-4, 6-3 winner over Lesia Tsurenko, have been playing each other for years.

"When the injury happened, it happened against Daniela," Clijsters said of the hip muscle spasms she had at the Brisbane International. "She's been playing well this season so far.

"We both go back a long way -- we grew up playing under-14s together. Now almost 30 -- still battling it out."

This was Clijsters' best run at a major since the last Australian Open -- she lost in the second round at the French Open and didn't play Wimbledon and the U.S. Open.

Li is also returning to form, going further than she has at a Grand Slam tournament since her breakthrough win at the French Open. She next plays No. 26 Anabel Medina Garrigues of Spain, who beat Olga Govortsova of Belarus 6-1, 6-0.

Third-seeded Victoria Azarenka, one of five players who could have the No. 1 women's ranking by the end of the tournament, beat Australian Casey Dellacqua 6-1, 6-0.

Li said she loved being back at Rod Laver Arena, where she burst onto the global tennis scene last year, while Clijsters still clearly feels at home on a court where she's still known as "Aussie Kim" long after her relationship with Lleyton Hewitt ended.

In a post-match TV interview, she asked presenter Rennae Stubbs a favor, saying her brother-in-law phoned her from Belgium to ask if she could convince the crowd to sing a birthday song for Elke, Clijsters' younger sister.

The crowd obliged, after Clijsters kicked it off.

Li took longer for her second-round win, saying it was harder than the scoreline suggested. She also has fond memories of Melbourne

Her form dipped after the French Open, with losses in the second round at Wimbledon and the first round at the U.S. Open, until she returned to Australia.

Coming off a run to the final at last week's Sydney International, Li was the first woman into the third round.

Li, who will be 30 next month and is seeded No. 5 at Melbourne Park, said she had great memories of the start of 2011.

"I'm feeling always good to come back to Rod Laver Arena," she said, reflecting on how her life had changed dramatically since last season started. "This year is much better than last year -- more fans come to watch me play, not only from China but all over the world."

Li's Chinese compatriot, 16th-seeded Peng Shuai, lost 6-2, 6-4 to Iveta Benesova of Czech Republic, while former No. 1-ranked Jelena Jankovic beat Chang Kai-chen of Taiwan 6-4, 6-2.

Serena Williams advanced to the second round in a match that finished after midnight, her ankle holding up to its first test since she sprained it in Brisbane two weeks ago. The only thing that bugged her, despite the 11:32 p.m. start on Tuesday, were the insects in a 6-3, 6-2 win over Tamira Paszek.

"I hate bugs more than you can imagine," Williams said. "Like, they kept jumping on me. Yuck!"

Between points, Williams picked up and moved or shooed away bugs that landed on court, and two that landed on her back. A big one gave her a fright, making her hop as she tried to stifle a screech.

"I'm going to request not to play at night anymore because I hate bugs, except for the final. I heard it's at night," Williams said. "I'll try to get used to them."

Two years after she won her last Australian Open title, Williams extended her winning streak to 15 matches at Melbourne Park in the season's first major tournament. She won titles in 2009 and 2010 but missed the chance to defend her title last year amid a prolonged injury layoff.

Williams was playing only her third match since losing the U.S. Open final to Sam Stosur last September, so she admitted being "a wee bit tight." Wimbledon champion Petra Kvitova and No. 4-ranked Maria Sharapova also advanced.

Stosur didn't make the second round, losing 7-6 (2), 6-3 to No. 59-ranked Sorana Cirstea, but fans hung around to watch another Aussie hope. Hewitt, a two-time major winner, gave the night session crowd something to cheer when he beat Cedrik-Marcel Stebe of Germany 7-5, 6-4, 3-6, 7-5, winning the last six games to overcome two service breaks in the last set.

Information from The Associated Press was used in this report.