Australian Open champion Kim Clijsters will move up one spot to No 2 while Serena Williams, who did not defend her title at Melbourne Park, will drop to her lowest ranking in nearly four years when the lists are released on Monday.

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Rafael Nadal maintains his No 1 ranking despite his Australian Open quarterfinal loss to David Ferrer, while Caroline Wozniacki held the women's No 1 ranking despite losing to China's Li Na in the semifinals.
Williams, who is recovering from a foot injury, dropped from fourth to 12th, her lowest ranking since March 2007 when she was No 18.
The 13-time Grand Slam singles winner cut her foot on broken glass after her win at Wimbledon in 2010.
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