Trio post wins at WTA Championships

ISTAMBUL – Victoria Azarenka is one win away from ending the year as world number one thanks to a hard-fought three-set victory over Germany’s Angelique Kerber at the WTA Championships in Turkey.The Belarusian saved two matches points on her way to recording a 6-7 (11-13) 7-6 (7-2) 6-4 victory in Istanbul. She faces Serena Williams on Thursday in her next group match.Williams beat China’s Li Na 7-6 (7-2) 6-3 for her second win of the Red Group and is guaranteed a semi-final place.Kerber, 24, started brightly against Azarenka, a succession of forehand winners proving key as she took the first set on a drawn-out tie-break.The contest soon became attritional, however, and world number one Azarenka gradually asserted her authority, taking the second set on another tie-break before closing out the third.“On the two match points against me I felt I had to go for it,” Azarenka said. “I felt she would not miss, so I didn’t want to wait for her to make a mistake - I was determined to make it happen.Williams, 31, heads the Red Group by virtue of having played, and won, one more match than Azarenka.Maria Sharapova , the world number two, is the only player who can finish above Azarenka at the top of the rankings in 2012. The Russian, competing in the White Group, beat Agnieszka Radwanska of Poland 5-7 7-5 7-5 in Wednesday’s final match.Defending champion Petra Kvitova , who is due to play for the Czech Republic in the Fed Cup final against Serbia in Prague next week, withdrew through illness on Wednesday.

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Trio post wins at WTA Championships