Caroline Wozniacki, Jelena Jankovic, Li Na, Kim Clijsters, Victoria Azarenka and Agnieszka Radwanska all advanced to the fourth round of the Australian Open and only Azarenka lost more than four games in a set.

Wozniacki and Jankovic will meet in the fourth round, after Wozniacki moved on with a commanding victory over Monica Niculescu 6-2 6-2 and Jankovic cruised past Christina McHale 6-2 6-0, playing well in crucial moments and saving ten break points. Even though Jankovic lost her last three meetings with Wozniacki, the Serb said it was in her overall bad period, and now her motivation and confidence are much greater.

A rematch of the last year's final is also awaiting in the fourth round as Clijsters faces Li. Clijsters beat Daniela Hantuchova 6-3 6-2 in her third match of the tournament, while Li advanced when Anabel Medina Garrigues retired with an ankle sprain after only three games. In the 2011 title match Clijsters defeated Li 3-6 6-3 6-3, in what was a positive experience for both players and the two are excited to repeat the challenge.

Victoria Azarenka, who will play Iveta Benesova in the fourth round, faced a fresh first-time WTA titlist Mona Barthel and won the first set against her in just 31 minutes, hitting only three unforced errors. Barthel brought more resistance in the second set, but after four match points Azarenka defeated her 6-2 6-4.

Julia Goerges moved into the second week of a Grand Slam for the first time after overcoming Romina Oprandi 3-6 6-3 6-1, the Italian who upset tenth seed Francesca Schiavone in the second round. Next for Goerges is Agnieszka Radwanska, the 6-2 6-2 winner over Galina Voskoboeva.

The second set of third round matches awaits! (photo: Tidalist)

Dear readers, professional tennis instructor Florian Meier from OnlineTennisInstruction.com is back with another guest post, this time presenting his take on the Australian Open women's draw. Florian's previous contributions to Women's Tennis Blog included in-depth analysis of Sabine Lisicki's game and US Open predictions. Enjoy Florian's preview!

Hey everyone. The Australian Open is about to start and this year the field seems to be wide open without clear favorites. Also many of the top players are struggling with injuries and Andrea Petkovic already had to withdraw from the event because of a back injury. In this article I want to give you my view on who has the best chances to win the tournament.

I decided to pick out four players who I believe have the biggest chance to win this year’s Australian Open title.

1. PETRA KVITOVA

Petra Kvitova is currently in a close battle with Caroline Wozniacki for the world number 1 ranking. She had her breakthrough winning Wimbledon last year and I think she has very good chances to become the most successful player in 2012.

Her game is big, she played well in the warm up matches to the tournament, and she seems to have the confidence and belief now.

CHECK OUT HOW WELL KVITOVA IS PLAYING IN THIS VIDEO

2. KIM CLIJSTERS

Clijsters is the defending champion and in my opinion always a threat at any Grand Slam. She had a tough second half of the season in 2011, where she did not play much at all because of several injuries.

Having had such a long preparation could be an advantage for her because she is probably in great shape right now. At the warm-up tournament in Brisbane she seemed to be in strong form but had to pull out because of a hip injury. The latest reports are saying that she is practicing at 100% though and therefore I think she is one of the favourites to win the title.

3. SERENA WILLIAMS

As usual it is difficult to assess what kind of form Serena Williams is in for the Australian Open. She has not played much before the tournament but she obviously likes the tournament, having won it five times in the past.

In a recent interview I heard Brad Gilbert, famous coach and expert, talk about how hard Serena was preparing and how well she looked out on the practice courts. An ankle injury forced her to pull out of Brisbane but she has also been seen practicing hard on site in Melbourne. She has not played many tournament matches in a while so it will be crucial for her to get through the first couple of rounds.

If she gets through the first couple of rounds and stays healthy she will definitely be one of the top favourites for the title. Read more »

Playing her first tournament since a four-month abdominal injury lay-off, Kim Clijsters had to give up her Brisbane International semifinal against Daniela Hantuchova because of a left hip injury, thus handing the Slovak her second straight uncompleted victory, as Serena Williams gave her a walkover in their quarterfinal due to an ankle problem.

Clijsters won the tiebreak 7-4 and already in that first set she felt stiffening, which was getting worse. She didn't want to risk and cause a complete spasm and muscle tear, so she stopped while trailing 3-1 in the second set.

Australian Open title defense is just a week and a half away for Clijsters. Tomorrow she will have an MRI to check the seriousness of the injury, but she's not blindly optimistic: "I don't doubt that there will be a problem once I start in Melbourne".

Hantuchova's opponent in the final will be Kaia Kanepi, who defeated Francesca Schiavone 6-3 6-0 in the semifinals.

Additional info: The 2012 season has barely started, and it seems that my New Year's wishes are not coming true – injuries are already piling up. Besides Serena Williams and Kim Clijsters, Sabine Lisicki is having a left abdominal muscle injury, Ksenia Pervak migrane, Polona Hercog low back injury, and not to mention Venus Williams and Maria Sharapova who have delayed their beginning of the season due to illness and injury. (photo: © Neal Trousdale)

In the 2011 fashion retrospections we have included major brands such as Nike (in several perspectives – on Maria Sharapova, Petra Kvitova, Serena Williams), Adidas on Daniela Hantuchova and Ana Ivanovic and on Andrea Petkovic, Lacoste on Samantha Stosur, Anta on Jelena Jankovic and Stella McCartney on Caroline Wozniacki, and now we're going to have a close look at Fila as worn by their brightest stars Kim Clijsters and Svetlana Kuznetsova.

Even though the Fila clothes themselves are not on top of my list when it comes to tennis fashion, I cannot imagine any other brand looking better on Clijsters and Kuznetsova. Therefore, I'm a huge fan of Fila and the way they nurture the vintage sporty look.

Fila doesn't experiment with ruffles, layers, glitter, dizzy patterns, etc. They like to keep designs traditionally athletic, meant primarily to cover your body so that you can play freely, without thinking whether some part of a dress would fall off (problems you would definitely face with Venus Williams' EleVen line). Read more »

Omair, our stats expert, is using numbers to clarify our never-ending debates. This time he will examine the emergence of players who reached the top of the WTA rankings without winning a Grand Slam - Kim Clijsters, Amelie Mauresmo, Jelena Jankovic, Dinara Safina and Caroline Wozniacki – and closer investigate their performance in the years they became number ones. Part 2, to be publish next week, will look into the slamless No.1 years of players that had crowned their careers with major titles. You'll see, it's a revealing perspective!

A lot of debate has been going on over the last few years regarding the coveted world No.1 spot in the WTA rankings. Issues have been raised that the WTA ranking system is flawed, that the player must win a Grand Slam before she gets to the top. Is the WTA ranking system really flawed? And is it mandatory for a player to be a Grand Slam winner before she attains No.1 in the rankings? If yes, then why? And if no, then why has the hype been created?

These are the questions that will be debated on forever. As for me, being the best player in the world does not mean that you have to win all the tournaments or you have to win some specific events. For me, the best player in the world is the one who has been the most consistent throughout the year. You should not be ranked the best player in the world if you win all the four majors and do poorly the rest of the year. A player doing well in all the tournaments has all the right to be the best player in the world. How do you define the best player? What is your opinion on who should be the world No.1 player?

THE BEGINNINGS OF "SLAMLESS NUMBER ONES": WHO WAS THE FIRST AND WHEN WAS THE TERM COINED?

The term "slamless No.1" first appeared in August 2003 when Kim Clijsters became the first Belgian ever (man or woman) to be ranked world No.1. During that stellar season, Clijsters compiled a 90–12 singles record. Her singles win total was the highest single-season total by any woman since Martina Navratilova in 1982. Clijsters was also the first woman to play more than 100 singles matches in a year since Chris Evert in 1974.

Amelie Mauresmo followed in the footsteps of Kim Clijsters in 2004, when Mauresmo became the first French player to attain the top spot in the WTA rankings. Jelena Jankovic then repeated the same feat in 2008 and clinched the year-end top spot as well. Dinara Safina followed in 2009 and Caroline Wozniacki in 2010.

While Clijsters did go on to win her first Grand Slam at the 2005 US Open, and Mauresmo did it at the Australian Open 2006, Safina, Jankovic and Wozniacki are still in the hunt of their first ever major trophy. Will they ever be able to win it, only time will tell us.

Let's have a look at the seasons of the these five players, during which they first attained the top spot. Let the numbers do the talking, and let yourself be the judge as to who do you think did the best during her season that saw her attain the world No. 1 ranking for the first time. Do comment on how do you people see the seasons of these five players.

PERFORMANCE OF SLAMLESS WORLD NUMBER ONES IN THE YEAR THEY REACHED THE TOP RANKING

GRAND SLAM RESULTS OF SLAMLESS WORLD NUMBER ONES IN THE YEAR THEY REACHED THE TOP RANKING

Read more »