TOKYO, Sept. 27 (UPI) -- World No. 1 Caroline Wozniacki needed three sets to finish a second-round match Tuesday at the Toray Pan Pacific Open tennis tournament in Tokyo.
Wozniacki defeated Jarmila Gajdosova 6-1, 6-7 (4-7), 6-3 in beginning her Pan Pacific title defense. She had received a first-round bye.
Wozniacki sailed through the first set and was on the verge of a straight-set victory when serving at 5-4 in the second. But Gajdosova posted her lone break of the match and forced the tiebreaker. Wozniacki took the lead in the third set by breaking Gajdosova at love for a 5-3 lead.
No. 3-seeded Victoria Azarenka beat Irina-Camelia Begu 6-1, 6-3; fourth-seeded Vera Zvonareva defeated Tsvetana Pironkova 7-5, 6-0; and fifth-seeded Petra Kvitova swept past Mandy Minella 6-2, 6-3 among seeded players winning second-round matches.
However, four seeds were ousted. Maria Kirilenko eliminated No. 6-seeded Samantha Stosur 6-2, 4-6, 6-4 and Vania King was a 6-4, 7-6 (8-6) winner over 11th-seeded Anastasia Pavlyuchenkova while Klara Zakopalova took a 6-3, 6-1 decision over No. 16 Shahar Peer.
Also, Iveta Benesova eliminated 14th-seeded Dominika Cibulkova 6-4, 6-2.
No. 10-seeded Peng Shuai won twice Tuesday, beating Jill Craybas 6-2, 6-0 in a first-round match and then topping Christina McHale 6-0, 6-3 in the second round.
Also, Kaia Kanepi was a 6-2, 6-2 winner over Coco Vandeweghe.
The first round was completed Tuesday with wins by Pironkova, Vandeweghe, Peng, Cibulkova, Benesova and McHale but only Benesova and Peng won their second matches of the day.