TOKYO (AP) -- Kaia Kanepi eliminated top-ranked Caroline Wozniacki of Denmark 7-5, 1-6, 6-4 on Wednesday to advance to the quarterfinals of the Pan Pacific Open.
The 43rd-ranked Kanepi rallied from three games down in the third set and won the match when she broke the defending champion with a forehand down the line.
After a sluggish start, Wozniacki dominated the second set but was unable to keep the momentum in the third when she was broken three times by the Estonian player.
In Thursday's quarterfinals, Kanepi will play the winner of a later match between Poland's Agnieszka Radwanska and Jelena Jankovic of Serbia.
In other matches, second-seeded Maria Sharapova earned a hard-fought 7-6 (4), 7-6 (4) win over 13th-seeded Julia Goerges of Germany.