(L-R) Samantha Stosur of Australia, Petra Kvitova of Czech Republic, Caroline Wozniacki of Denmark, Maria Sharapova of Russia, Li Na of China, Vera Zvonareva of Russia and Agnieszka Radwanska of Poland pose for the official photo of the TEB BNP Paribas WTA Championships - Istanbul on October 23, 2011 in Istanbul, Turkey.