SINGAPORE - OCTOBER 18:  L-R Caroline Wozniacki of Denmark, Agnieszka Radwanska of Poland, Petra Kvitova of Czech Republic, Maria Sharapova of Russia, Serena Williams of the USA,Simona Halep of Romania, Eugenie Bouchard of Canada and Ana Ivanovic of Serbia pose for a group photograph at the Marina Bay Sands shopping centre afterthe draw ceremony prior to the start of the BNP Paribas WTA Finals at Singapore Sports Hub on October 18, 2014 in Singapore.  (Photo by Clive Brunskill/Getty Images)