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"&lt;p&gt;&lt;/p&gt;&lt;p&gt; Li Na trails No. 2 Victoria Azarenka by only 11 points. (Chris Hyde/Getty Images)&lt;/p&gt;&lt;p&gt;Li Na is closing in on the WTA Tour's No. 2 ranking after winning the Australian Open.&lt;/p&gt;&lt;p&gt;The two-time major champion moved up one spot this week, to a career-high-tying No. 3, and she trails second-ranked Victoria Azarenka by only 11 points. Serena Williams remains comfortably in the No. 1 position.&lt;/p&gt;&lt;p&gt;&lt;strong&gt;ATP rankings: Federer falls to No. 8&lt;/strong&gt;&lt;/p&gt;&lt;p&gt;In other rankings news:&lt;/p&gt;&lt;p&gt;\u2022 Maria Sharapova slipped from No. 3 to No. 5 after a fourth-round loss. Agnieszka Radwanska is now sandwiched between Li and Sharapova at No. 4.&lt;/p&gt;&lt;p&gt;&lt;/p&gt;&lt;p&gt;\u2022 Simona Halep supplanted Caroline Wozniacki at No. 10, becoming the third Romanian to be ranked that high.&lt;/p&gt;&lt;p&gt;\u2022 Australian Open finalist Dominika Cibulkova climbed from No. 24 to No. 13. Her career high is No. 12.&lt;/p&gt;&lt;p&gt;\u2022 Eugenie Bouchard, 19, made her top-20 debut, at No. 19, after reaching the semifinals in Melbourne. She's one spot behind Sloane Stephens, who dropped from 13th to 18th after falling two rounds short of last year's semifinal appearance.&lt;/p&gt;&lt;p&gt;Here's an explanation of the WTA's rankings system:The WTA rankings are based on a 52-week, cumulative system. A player's ranking is determined by her result at a maximum of 16 tournaments for singles. The tournaments that count towards a player's ranking are those that yield the highest ranking points during the rolling 52-week period. They must include points from the Grand Slams, Premier Mandatory tournaments and the WTA Championships. For Top 20 players, their best two results at Premier 5 tournaments (Doha, Rome, Cincinnati, Montr\u00E9al/Toronto and Wuhan) will also count.&lt;/p&gt;"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.si.com/tennis/beyond-baseline/2014/01/27/wta-rankings-li-na-dominika-cibulkova>