Tennis stars face quickfire challenge

open court azarenka radwanska na kvitova kerber errani sharapova_00001723
open court azarenka radwanska na kvitova kerber errani sharapova_00001723

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    Tennis stars face quickfire challenge

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Azarenka, Radwanska, Na, Kvitova, Kerber, Errani and Sharapova take on CNN's Pedro Pinto's quickfire questions!