Elena Dementieva, the 7th seed in Tokyo, defeated 2nd seed Vera Zvonareva 7-5, 6-2 today in the quarterfinals. Also advancing were 5th seed Francesca Schiavone, who defeated Kaia Kanepi 7-5, 4-6, 7-5 (the match lasted over three hours), and 8th seed Victoria Azarenka, who defeated qualifier Coco Vandeweghe 6-2, 6-1. 6th seed Agnieszka Radwanska had to retire against top seed Caroline Wozniacki because of a left foot injury.
In doubles, the two top-seeded teams were upset. Shahar Peer and Peng Shuai defeated number 1 seeds Gisela Dulko and Flavia Pennetta. Iveta Benesova and Barbora Zahlavova Strycova defeated number 2 seeds Kveta Peschke and Katarina Srebotnik. Two other teams won because of walkovers.