BEIJING, Oct. 6 (Xinhua) -- Top seed Caroline Wozniacki of Denmark brushed aside Sara Errani from Italy 6-4, 6-2 to advance to the third round of China Open here on Wednesday, while second seed Vera Zvonareva of Russia struggled to reach the last eight.
Wozniacki, who enjoyed a first-round bye as the world number two had just won the Pan Pacific Open in Tokyo, didn't find her stride in the opening set and Errani brought some trouble.
After trading service breaks, Errani leveled the game score at 4-all.
Wozniacki stayed cool to break again in the pivotal 10th game to grab the first set.
In the second set, the world second-ranked didn't leave any chance to her Italian rival, raising her serve quality and confining the opponent in the bottom line with heavy, wide-angle groundstrokes.
Under Wozniacki's fierce attack, Errani got all her serves broken in this set. With Errani sending a forehand back wide, the Dane blonde converted on her second match point to pocket the victory.
Wozniacki will fight for a quarterfinal spot with Petra Kvitova of the Czech Republic.
Also as one of the hottest players in the WTA tour this season, Zvonareva had a relatively tough match. The 26-year-old Russian survived scare in the third round, rallying to beat compatriot Maria Kirilenko 5-7, 6-4, 6-2.
Kirilenko was quite efficient in the first set, converting both of her break chances to edge Zvonareva 7-5.
The second set remained tight and both of the Russians seemed invincible in their service games. Zvonareva capitalized her sole break point to clinch the set.
In the final set, the 23-year-old Kirilenko lost control of her rhythm, threw in the towel soon in 6-2.
Zvonareva will face Italian 5th seed Francesca Schiavone, who defeated Vera Dushevina of Russia 4-6, 6-3, 6-1.
In the men's draw, top seed Novak Djokovic of Serbia and 4th seed Nikolay Davydenko of Russia all advanced.
Djokovic eased past the second round as his opponent Mardy Fish of United State quit due to injury. Davydenko had a tough win over last year's runner-up Marin Cilic 7-5, 7-5.
With still four days to go before the conclusion of China Open, chairman and CEO of WTA Tour Stacey Allaster expressed her satisfaction with the Crown Jewel tournament.
"For those of us from the West, we often refer to China as an emerging tennis market. Today I think we can confidently say that China is no longer an emerging tennis market. It has emerged," said Allaster at a press conference.
"We have four crown jewel events, Indian Wells, Miami, Madrid and here in Beijing. We were very strategic when we redesign the calendar to put one of the top four events in China. Those four events are key to out long-term success.
"We share the goal to develop Beijing into a tennis capital in Asia, and we think in long term that is fantastic opportunity for women tennis."