Even in a Grand Slam as unpredictable as this year's Australian Open, the names in the women's semifinals may still prompt head-scratching among casual followers of tennis. With the three biggest stars of the women's game falling one by one - top-seeded Serena Williams, followed by Maria Sharapova and two-time Australian Open champion Victoria Azarenka - the door has opened for a first-time winner at Melbourne Park. Only fourth-seeded Li Na has won a Grand Slam before - the 2011 French Open. Fifth-seeded Agnieszka Radwanska of Poland was the 2012 Wimbledon finalist, but had never been beyond the quarters in Melbourne until she chipped, lobbed and sliced Azarenka off the court in a remarkable display of shot-making on Wednesday. More...