The women's quarterfinals are now set at the 2013 Australian Open. Last year, I predicted 4 of 4 women's quarterfinals correctly and 4 of 4 men's quarterfinals correctly. I have also previewed the 2013 Australian Open men's quarterfinals.
Victoria Azarenka (BLR)  vs
Serena Williams (USA)  vs Sloane Stephens (USA) . This all-American match-up represents a tussle between the oldest and youngest players in the draw, reflecting the past and current state of American tennis as well as its future. Serena has been in fine form through the first four rounds of the tournament, serving up four bagel sets so far (one less than Maria Sharapova). Stephens is only 19 years old but depending on other results, after this tournament her WTA ranking may be slightly less than her age, which is always a good sign. The fact that she, like Serena, is also African-American is also notable. Serena has been serving as something like a mentor on tour for Sloane and the two played for the first time at the Brisbane tournament that Serena won as her warm-up before this year's Australian Open. The two played to a pretty close 6-4 6-4 win for Serena and afterwards Sloane raised some eyebrows afterwords with some slightly critical comments about Serena's demeanor on court. I suspect that Serena will use this opportunity to gently demonstrate the difference between a 15-time major champion and someone playing in their first major quarterfinal. Mad Professah's pick: Serena in 2 sets.
Na Li (CHN)  vs Agnieszka Radwanska (POL) . Li Na has often played her best tennis in Australia, and it was the Asian/Pacific slam where she made her first breakthrough, reaching the final in 2011 and acquitting herself well despite losing in three sets to now-retired Kim Clijsters. Radwanska has yes to lose a match in 2013, in fact she has not even lost a set in the three tournaments that she has played in. Li Na leads their career head-to-head 5-4 but the two played each other in Sydney right the start of the Australian Open and Aggie won easily. The Pole has played in six major quarterfinals in her career but has only won one of them. Na has also played in six major quarterfinals but she has won three of those, including two in Melbourne. This match-up should be the most dramatic of the four women's quarterfinals played this year. Aggie is a quintessential counter-puncher, a version 2.0 of Martina Hingis who is not as mean but just as crafty. Li Na is a card-carrying member of the "Big Babe Tennis" club and can match power with any of the women at the top of women's tennis. Na's man weakness is her mental fortitude but she has been working with Justine Henin's former svengali, Carlos Rodriguez, for about 5 months now. I believe that the more experienced (and more aggressive) player will end the match victorious. Mad Professah's pick: Li in 3 sets.