Li Xiuli, TOM Online's marketing director, now says the company doesn't monitor or record any of its users' communications or personal information.

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As for Williams, she still has a chance of reclaiming the World No. 1 ranking if defending champion Azarenka doesn't retain her title or if Maria Sharapova loses her semifinal against Li Na.

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"Don't quote me on this, but tom.com has a big Li Ka-shing premium attached to it, " says one Hong Kong-based fund manager, who doesn't own the stock but wishes he did.

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