SINGAPORE - OCTOBER 23: (L-R) Flavia Pennetta of Italy, Agnieszka Radwanska of Poland, Maria Sharapova of Russia, Simona Halep of Romania, Garbine Muguruza of Spain, Petra Kvitova of Czech Republic, Angelique Kerber of Germany and Lucie Safarova of Czech Republic pose for the official photo of the BNP Paribas WTA Finals at the National Gallery on October 23, 2015 in Singapore. (Photo by Julian Finney/Getty Images)
