SINGAPORE - OCTOBER 18: Caroline Wozniacki of Denmark, Agnieszka Radwanska of Poland, Petra Kvitova of Czech Republic, Serena Williams of USA, Maria Sharapova of Russia, Ana Ivanovic of Serbia, Eugenie Bouchard of Canada and Simona Halep of Romania look on at the draw during previews for the WTA Finals at the Marina Bay Sands Shopping centre on October 18, 2014 in Singapore.  (Photo by Julian Finney/Getty Images)