Tokyo, Japan - Ana Ivanovic defeated Caroline Wozniacki to win the title at the Pan Pacific Open on Sunday.

In a matchup of former world No. 1s, Ivanovic took down Wozniacki 6-2, 7-6 (7-2) to capture her 15th singles title and fourth this year. Ivanovic didn't drop a single set in this event.

Ivanovic fired four aces and improved to 5-2 lifetime against Wozniacki, with this match being the first time the two had met in a final.

The 26-year-old Serb beat Venus Williams in Auckland to start the season and topped Jovana Jaksic in Monterrey in April before losing to Maria Sharapova in Stuttgart a few weeks later. Ivanovic then beat Barbora Zahlavova Strycova at the Wimbledon tune-up in Birmingham before falling to Serena Williams in the Cincinnati final prior to the U.S. Open.

Wozniacki won this event in 2010, while Ivanovic had lost to Martina Hingis in the final in 2007.

This was Ivanovic's first event since a stunning second-round exit at Flushing Meadows, while Wozniacki was also playing for the first time since the U.S. Open, when she fell to Serena Williams in the final.

Ivanovic collected $196,670 for the victory.