The match ended with Zheng's serve hitting the service line and Ivanovic shanking her forehand return into the Court 1 stands.

Zheng Jie of China returns the ball to Ana Ivanovic of Serbia during their match at the Wimbledon tennis championships in London June 27, 2008

"She played really well today and it was a tough match for me," Ivanovic said. "I'm disappointed with my loss but I still look at it as a learning experience. "It was a very emotional last couple of weeks for me and it took a bit of a toll," she added. "I didn't have great preparation."

Zheng has won 11 tour doubles titles, including the 2006 Wimbledon and Australian Open championships with Yan Zi. She has captured three career singles titles, in relatively small events at Hobart in 2005 and Estoril and Stockholm in 2006.

In 2004, Zheng reached the round of 16 at the French Open to become the first Chinese woman to make the fourth round of a GrandSlam. She reached a career high singles ranking of No. 27 in 2006.

Zheng will play singles and doubles for China at the Beijing Olympics in August.

"I felt today the match gave me more belief for the Olympics," she said.

Also on Friday, Roger Federer continued his march toward a sixth straight Wimbledon title by beating Marc Gicquel in straight sets, setting up a fourth-round match up with the last man to win the championship before his run began.

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