Li created history when she became the first Chinese singles player to reach a grand slam quarterfinal at Wimbledon two years ago and the first to reach the world's top 20.

Australian Open champion Sharapova maintained her unbeaten record in 2008 as she marched into the semifinals in less than an hour.

"It was a pretty solid performance apart from one game in the second set," said Sharapova. "I felt pretty comfortable from the beginning. I was aggressive. I served and returned pretty well and felt pretty good."

Sharapova now plays Radwanska, who reached her first WTA Tour semifinal with a three-hour 4-6, 7-6 (1), 6-4 win over another 18-year-old, Dominika Cibulkova of Slovakia.

Zvonareva, an unseeded former top ten player, reached a semifinal for the second time this year, overcoming Sybille Bammer, the 15th seeded Austrian 6-2, 2-6, 0-6.

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