Top seed Caroline Wozniacki loses to Kim Clijsters at the Australian Open . Wozniacki will lose world No . 1 ranking and is still searching for a first grand slam title . Defending champion Clijsters to face third seed Victoria Azarenka in the semifinals . No . 48 Belarus ' Azarenka came from a set down to beat eighth seed Agnieszka Radwanska .
Top seed Caroline Wozniacki loses to Kim Clijsters at the Australian Open . Wozniacki will lose world No . 1 ranking and is still searching for a first grand slam title . Defending champion Clijsters to face third seed Victoria Azarenka in the semifinals . Belarus ' Azarenka came from a set down to beat eighth seed Agnieszka Radwanska .