BEIJING -- Second-seeded Victoria Azarenka moved into the third round of the China Open with a victory over Polona Hercog, while in the men's draw third-seeded Tomas Berdych advanced with a win over Philipp Kohlschreiber.
The fourth-ranked Azarenka will next face Anastasia Pavlyuchenkova of Russia. Pavlyuchenkova beat Azarenka in doubles Wednesday.
"I just need to get some rest and get ready for tomorrow," Azarenka said after her 7-6 (8), 6-3 win.
In the third round, Ana Ivanovic defeated third-seeded Vera Zvonareva 6-2, 6-1. Ivanovic will next meet 11th-seeded Agnieszka Radwanska of Poland, who beat Zheng Jie of China 6-1, 6-4.
In another third-round match, ninth-seeded Andrea Petkovic of Germany defeated eighth-seeded Marion Bartoli of France, 6-4, 4-6, 7-5 in a 2-hour, 44-minute match.
Berdych won 6-2, 6-0. The Czech next faces Fernando Verdasco of Spain, who defeated Flavio Cipolla of Italy 2-6, 6-1, 6-2.
Ivan Ljubicic of Croatia beat Florian Mayer of Germany 6-0, 2-6, 6-3, and Mikhail Youzhny of Russia beat Feliciano Lopez of Spain 6-7 (5), 6-2, 7-5.