Kvitova dispatched Anastasia Pavlyuchenkova 2-6, 6-2, 7-5 to create a semifinal meeting with Klara Zakopalova. Wozniacki defeated Sloane Stephens 7-6 (8-6) 6-2 and will meet Simona Halep in the semifinals.
Zakopalova rallied past Elena Vesnina in the quarterfinals 4-6, 6-0, 6-4 and Halep won over Ekaterina Makarova 6-1, 7-6 (8-6).
Kvitova is looking for her second championship of the year and the 11th of her career. Wozniacki has 20 tournament victories to her credit, but none have come this season.
2014: The Year in Music [PHOTOS]