Agnieszka Radwanska and Eugenie Bouchard were both upended at the China Open on Tuesday, but they are still hoping to book their trips to the BNP Paribas WTA Finals Singapore presented by SC Global by tournament's end. Their fates are held in the balance by Angelique Kerber and Ekaterina Makarova.
Bouchard will have her eyes glued to Kerber's remaining matches. If Kerber fails to reach the final, Bouchard is in. For Radwanska to qualify, Kerber will have to fall short of the final while Makarova will have to exit without the winner's trophy in her hands.
Ana Ivanovic, who defeated Romina Oprandi to advance to the third round, and Caroline Wozniacki, who plays Samantha Stosur in her opening match on Wednesday, could also be tied into Kerber and Makarova if their own efforts should fall short.
Kerber faces Svetlana Kuznetsova in the third round and her path gets steeper should she advance. She could potentially face Carla Suárez Navarro or Maria Sharapova in the quarterfinals. The semifinals offer possible showdowns against Sabine Lisicki, Ivanovic, Andrea Petkovic or Simona Halep.
Makarova next takes on Roberta Vinci, who upset Radwanska, 6-4, 6-4, on Tuesday. She could face Petra Kvitova, Peng Shuai or Venus Williams in the quarterfinals. The semifinals offer up potential foes in Serena Williams, Lucie Safarova, Alizé Cornet, Lauren Davis, Samantha Stosur and Wozniacki.
One thing that is clear; the remaining places will be filled by four of the following six players: Bouchard, Radwanska, Ivanovic, Wozniacki, Kerber and Makarova.