Caroline Wozniacki had to play for over two and a half hours, but she defeated Li Na 4-6, 6-3, 6-4 in the third round in Tokyo today. Sara Errani defeated Marion Bartoli in three sets, and Sam Stosur beat Dominika Cibulkova. 2nd seed Maria Sharapova defeated Lucie Safarova.
In the second round, Sharapova had to go three sets to overcome qualifier Heather Watson, who upset Sabine Lisciki in the opening round.
Top seed Victoria Azarenka has advanced to the quarterfinals, as has defending champion Agnieszka Radwanska.
Here is the quarterfinal draw:
Victoria Azarenka vs. Angelique Kerber
Agnieszska Radwanska vs. Caroline Wozniacki
Sara Errani vs. Nadia Petrova
Sam Stosur vs. Maria Sharapova