Serbia's Ana Ivanovic reacts after wining a point during her match against Russia's Vera Zvonareva at the China Open tennis tournament in Beijing Oct 5, 2011. [Photo/Agencies]

BEIJING - Third seed Vera Zvonareva crumbled to a 6-1 6-2 defeat by Serbia's Ana Ivanovic in the third round of the China Open on Wednesday and there was more disappointment for home fans as Zheng Jie was bundled out by Agnieszka Radwanska.

Zvonareva, the world number three, had no answer to the attacking groundstrokes of 18th seed Ivanovic in a one-sided opening set. The Russian tried to mix things up in the second but could make little impression and was left on the floor by one wrong-footing forehand by her opponent.

Fourth seed Victoria Azarenka secured a last 16 berth with a 7-6 6-3 victory over Slovakian Polona Hercog.

Zheng enjoyed strong support from a partisan crowd in the 15,000-seater arena but the world No.72's hopes of claiming a major scalp were crushed by Radwanska in a 6-1 6-4 defeat.

With French Open champion Li Na a surprise first-round casualty China's sole survivor in the tournament is lowly-ranked wildcard Zhang Ze who faces a daunting task against Frenchman Jo-Wilfried Tsonga in the men's second round on Thursday.

In the men's draw, Spain's Fernando Verdasco came back from a set behind against Italy's Flavio Cipolla, winning 2-6 6-1 6-2 to reach the quarter-finals. Russia's Mikhail Youzhny beat Spain's Feliciano Lopez 6-7 6-2 7-5.

Serbia's Ana Ivanovic blows a kiss to the crowd after winning the match against Russia's Vera Zvonareva at the China Open tennis tournament in Beijing Oct 5, 2011. [Photo/Agencies]