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As the Australian Open 2011 moves into it's third and fourth rounds, two of the top three women's players in the world will take the court as they try and advance into the fourth round.

 Vera Zvonareva, currently ranked second in the world, is set to face Lucie Safarova of the Czech Republic. Zvonareva has been playing the best tennis of her career, and is seeking her first-ever Grand Slam title in Melbourne this week. 

Meanwhile, the Kim Clijsters comeback tour continues, as the Belgian takes on Frenchwoman Alize Cornet in her third round match. 

Clijsters is ranked third in the world right now, and is playing well enough to be considered the favorite to win the Australian Open which she's never done before, although she reached the finals in 2004. 

For more, check out Australian Open 2011: 10 Reasons Kim Clijsters Can Win a 2nd-Straight Grand Slam. 

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The Australian Open 2011 continues today, and three of the top five players in the world, top-ranked Rafael Nadal, fourth-ranked Robin Soderling and fifth-ranked Andy Murray will take the court in third-round matchups sure to deliver some fantastic tennis. 

Nadal, who is on a quest to take home his fourth-straight Slam title, will face Australian teenager Bernard Tomic in his third round match. Tomic has been playing well, but can he slow a scalding Rafa?

Soderling, currently ranked fourth, will face Jan Hernych in the Czech Republic. Soderling has been enjoying one of the most consistent runs of good tennis in recent memory, and there's nothing to suggest that that streak will slow against a player of Hernych's caliber. 

Finally, Murray, who is seeking his first-ever Grand Slam title, takes on 23rd-ranked Guillermo Garcia-Lopez of Spain in the toughest third-round match any of the three face. Garcia-Lopez has been playing well of late, but given Murray's stellar play this season, can the Spaniard hold his own against the precocious Scot? 

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Caroline Wozniack's quest for her first-ever Grand Slam title continued Friday, as the 20-year-old Dane rolled over Dominika Cibulkova, 6-4, 6-3 to advance to the fourth round.

Wozniacki is playing in her first slam as the top-ranked women's player in the world, and has looked sharp thus far in the tournament. 

But it was Caroline's post-match interview that turned some heads. Having been told she was too boring in interviews, Wozniacki told the media she knew what questions would be asked, so she'd just give her stock answers in a hurry. 

She then opened up the floor to "more interestng" subjects, including the piano, cricket, soccer, and what she's looking for in a boyfriend. 

In her fourth round match, the Danish tennis player will take on Anastasjia Sevastova of Latvia. 

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The Australian Open 2011 is moving slowly into the fourth round, and a pair of top 10 players, Novak Djokovic and Tomas Berdych, both punched tickets into the fourth round with convincing wins on Friday. 

Djokovic, the third-ranked player in the world, rolled over Serbian Viktor Troicki 6-2, 0-0 after Troicki retired with a stomach muscle strain. 

"It's not really the way you want to win -- especially if you're playing against one of your best friends," Djokovic said. "Unfortunately he wasn't able to play 100 percent of his abilities."

Berdych's road into the round of 16 was also relatively painless, as the sixth-seeded Czech knocked off Richard Gasquet 6-2, 7-6 (3), 6-2. Berdych controlled much of the first set, and the third set, but Gasquet's game gave Berdych fits in the second. 

He'll meet Spaniard Fernando Verdasco in the fourth round. 

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Andy Roddick, the best-ranked American man in tennis, moved on to the fourth round after a hard-fought win over Robin Haase of the Netherlands. Roddick got off to a slow start in this one, but used 32 aces to come on strong late, en route to a 2-6, 7-6, 6-2, 6-2 win. 

Roddick used 32 aces to overpower Haase, who is ranked 62nd in the world coming into this match. The American, currently ranked eighth, is trying to recover the strong form he showed prior to being diagnosed with mononucleosis midway through the 2010 season. 

Roddick is seeking his second Grand Slam title, having won the U.S. Open in 2003, and given the way he's playing right now, he's got a real chance of pulling it off. 

Roddick's next opponent will be 19th-ranked Stanislas Warwrinka of Switzerland. 

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Justine Henin's bid to win the Australian Open drew to an inauspicious close on Friday morning, as the Belgian fell to Russian Svetlana Kuznetzova 6-4, 7-6 (8), giving her one of the worst Grand Slam showings of her career. 

"There are some days that are harder than others for a lot of reasons, physical, mental, your adversary also, sometimes a style of game that is harder to manage, the pressure," Henin said, according to ESPN.com, "But obviously I wanted to play, I wanted to win. I wanted to go as far as possible."

Henin was battling elbow issues all match long, and was clearly playing in pain and discomfort throughout the match with Kuznetzova, who had never beaten Henin in a major tournament. This marks the first time since Wimbledon in 2005 that Henin has failed to advance past the third round of a tournament. 

Kuznetzova will now face defending French Open champion Francesca Schiavone in the fourth round. 

For more tennis news, check out Australian Open 2011: Venus Williams and 10 Other Americans With a Shot. 

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Roger Federer may have had a devil of a time advancing to the third round, but he found things back to business as usual once he got there. 

After being pushed to the limit by Gilles Simon in round 2, Federer breezed through third-round opponent Xavier Malisse with a 6-3, 6-3, 6-1 victory to move into the fourth round. 

The win was Fed's 57th match win at the Australian Open, passing Stefan Edberg's mark for the most Aussie Open wins in the Open era. 

"It's very nice, but he still stays my idol," said Federer, according to ESPN.com

Federer had struggled in the second round, pushed to five sets by Frenchman Gilles Simon, who had won the pair's previous two meetings.

Next up for the 16-time Grand Slam champ is Tommy Robredo of Spain. 

For more tennis news, check out Australian Open 2011: Venus Williams and 10 Other Americans With a Shot. 

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Venus Williams was forced to withdraw after seven points of her third-round match with Andrea Petkovic of Germany, after sustaining an injury to her psoas muscle, which helps to flex the hips and back. 

The fifth-ranked star lunged for a shot by Petkovic, and cried out in pain, clutching her side. It soon became clear that Williams would not be continuing with the match. 

This isn't Venus' first injury of the tournament, as she hurt her thigh against Sandra Zahlavova in her second-round match Wednesday. 

On Friday, she had lost the first game of the match, and was down in the second when the injury struck, and her eyes appeared welled up with tears as she left Rod Laver Court. 

"It's super disappointing because this is just not how I envisioned my Australian Open being," Venus Williams said, according to ESPN.com, "I'm just going to focus obviously on getting healthy and coming back, because I love tennis and I've got a lot of great tennis in me."

For more tennis news, check out Kim Clijsters Interview and the Most Cringe-Worthy Moments in Sports.