LONDON - China's Zheng Jie, who knocked out top seed Ana Ivanovic last week, upset the form book again on Monday, defeating 15th seed Agnes Szavay 6-3 6-4 to reach the Wimbledon quarter-finals.

Zheng Jie of China returns the ball to Agnes Szavay of Hungary during their match at the Wimbledon tennis championships in London June 30, 2008. [Xinhua]

Zheng has had Chinese newspapers in a frenzy with headlines declaring her form had reignited hopes of tennis gold at the Beijing Olympics and the 24-year-old played down her chances of success at the August Games.

"Of course the Olympics in China is very important," Zheng told a news conference. "But everyone wants to win a gold medal. I think maybe the doubles is a better chance for gold."

The former Wimbledon and Australian Open doubles champion faces the 18th-seeded Czech Nicole Vaidisova in the Wimbledon quarters and having not yet dropped a set, has a realistic shot of becoming the first Chinese player to reach a grand slam semi-final.

"I feel in the quarter-final is fine. I don't want to think too much of the semi-final," Zheng said after joining Li Na as the only players from China to reach the last eight at Wimbledon.

Wildcard Zheng, ranked 133rd in the world before the tournament after missing most of last season with an ankle injury, broke Szavay midway through the first set to take the early initiative.

The 19-year-old Hungarian wrestled it back to race to a 4-1 second set lead but the busy Zheng rattled off five games in a row in a performance she rated superior to Friday's victory over world number one Ivanovic.

"I feel today is best tennis for me. Of the two matches, I think this match is best," she said.

Zheng's Wimbledon success boosts China's Olympic hopes

 Zheng Jie's victory over world number one Ana Ivanovic at Wimbledon has reignited China's hopes of tennis gold at the Beijing Olympics after a largely dismal 18 months for the country's leading women players.

The 24-year-old became the first Chinese to beat a reigning world number one with a 6-1 6-4 thrashing of Serb Ivanovic in the third round on Friday, a victory all the more remarkable because she was playing as a wild card ranked 133rd in the world.

Zheng, who missed most of last year with an ankle injury, is a former Wimbledon and Australian Open doubles champion as well as an Asian Games doubles and singles champion.

"All she's missing is an Olympic gold," read a headline in Titan Sport newspaper. "China's golden flower expected to bloom at the Olympics," added Beijing Youth Daily.

China's hopes of success in August had faded since Zheng helped lead the breakthrough for Chinese women in 2006.

She teamed up with Yan Zi to win China's first major titles in Melbourne and at the All England Club, won her second and third WTA singles events and helped China reach the Fed Cup world group for the first time.

Only Li Na did better, becoming the first Chinese to reach the last eight of a grand slam, at Wimbledon, and the first player from her country to move into the top 20.

Zheng and Li have since struggled with injury and loss of form and Yan is currently the top-ranked Chinese woman at number 45, a spot ahead of Li.

Gao Shenyang, deputy director of the Chinese Tennis Association, hailed the victory and said Zheng was a blueprint for a new generation of players.

"It was a remarkable moment for Chinese tennis," he told the Beijing News.

"Zheng has two reasons to win. One is her mentality. She never gives up until last moment. Second is her way of playing -- speed, variety, cleverness. That can represent the future direction of development of Chinese players."

Zheng will also play doubles in Beijing because, with long-time partner Yan, she is still considered the best chance of China retaining the Olympic women's doubles gold medal won by Sun Tiantian and Li Tie in Athens.

Zheng and Yan both come from Sichuan capital Chengdu, which was hit by a devastating earthquake on May 12.

"We will dedicate our achievements to our local people," they said.