Dominika Cibulkova and top seed Agnieszka Radwanska have both advanced to the Sydney semifinals by defeating Sara Errani and Roberta Vinci, respectively.
Qualifier Madison Keys, who defeated Lucie Safarova in the the first round, went on to defeat Zheng Jie in the second round. Impressive. However, Keys will next face 4th seed Li Na, which is likely to mean that her run will end.
Svetlana Kuznetsova, who defeated Caroline Wozniacki in the second round, will play 2nd see Angelique Kerber in the quarterfinals.