World No.1 reaches final with three -set win over Williams . Williams will play China 's Li Na for first prize of 1,090,000 . Defending champion Serena Williams overcame a gutsy display from Jelena Jankovic on Saturday to reach the final of the WTA Championships in Istanbul . Jelena Jankovic 's semifinal win lifts her to The World No.1 -- the highest-ever ranking for an Asian woman . Roger Federer through to ATP Tour final in Basel , China .
World No.1 reaches final with three -set win over Williams . Williams will play China 's Li Na for first prize of 1,090,000 . Jelena Jankovic 's semifinal win lifts her to The World No.1 -- the highest-ever ranking for an Asian woman . Roger Federer through to ATP Tour final in Basel , China .