World No. 2 Jin Young Ko rallied from a four-stroke deficit to defeat fellow South Korean Hee Jeong Lim in a playoff on Sunday at the BMW Ladies Championship in Busan, South Korea.

Ko fired eight birdies in a bogey-free round to finish at 8-under 64 and a 72-hole total of 266. On the first playoff hole, Ko carded her ninth birdie of the day while Lim settled for par and the runner-up finish.

"I wasn't that nervous going into the playoff," Ko said. "I think I was feeding off the confidence I had during the round."

It's the 11th career title and fourth this year for Ko, who is projected to return to No. 1 when the new world rankings are released.

Ko moved into a tie with Lim at 19-under with a birdie on No. 8, her fifth of the round. Both players birdied No. 9 to stay even until Ko birdied the par 4 12th hole.

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"With the 12th hole, the tee shot and the putting all went as I would have liked, and that was I think why I birdied that hole," Ko said. "And I knew a birdie putt was really important. I felt that I did not know how the game was going to change if I did not succeed, so I knew it was going to be very important to get that shot."

Lim, who didn't record a bogey in any of her rounds, responded with back-to-back birdies on Nos. 14 and 15 to retake the lead, but Ko evened things up again on No. 17.

"I don't think my ball striking was to the place where I wanted it to be," said Lim, who finished second for the third time on the KLPGA Tour this season.

"I think there was also that pressure having -- being in the lead as well. So I think there wasn't much I could do, and I guess losing by a birdie in the playoff."

South Korea's Na Rin An, who started the day tied for second with Ko, fired a 3-under 69 for the third straight day to finish in a four-way tie for third place. She was joined by New Zealand's Lydia Ko (64) and fellow South Koreans A Lim Kim (64) and Da Yeon Lee (65).