Petra Fernández beats Caroline Garcia to make semis at WTA Finals . Kvitova wins 6 - 4 6 - 2 to knock world No.1 Woznaicki out of competition . Victoria Azarenka joins Kvitova in the final four after beating China 's Li Na . Agnieszka Radwanska beats Vera Zvonareva to keep hopes of semi ##s alive .
Petra Kvitova beats Caroline Wozniacki to make semis at WTA Championships . Kvitova wins 6-4 6-2 to knock world No.1 Woznaicki out of tournament . Victoria Azarenka joins Kvitova in the final four after beating China 's Li Na . Agnieszka Radwanska beats Vera Zvonareva to keep hopes of semi berth alive .