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** FILE ** In this Jan. 22, 2008 file photo, Serbia's Jelena Jankovic celebrates her victory over Serena Williams of the United States during their Women's singles quarter-final match at the Australian Open tennis tournament in Melbourne, Australia. Jankovic of Serbia will end the season at No. 1, outlasting an unprecedented four others who held the top ranking during the year. The 23-year-old will retain the top spot regardless of the outcome of the season-ending Sony Ericsson Championships in Doha, the WTA Tour announced Saturday. (AP Photo/Andrew Brownbill, File)