Wozniacki, Kvitova serve up wins at the WTA finals

Associated Press
Petra Kvitova celebrates after defeating Vera Zvonareva in the first match of the WTA Championship finals in Istanbul, Turkey, Tuesday, Oct. 25, 2011.(AP Photo/Vadim Ghirda)

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Top-ranked Caroline Wozniacki rallied to defeat Agnieszka Radwanska of Poland 5-7, 6-2, 6-4 Tuesday in their opening round-robin match at the WTA Championships. (AP)

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