PORTLAND (AFP)— Thailand teenager Chanettee Wannasaen fired a dazzling nine-under par 63 on Sunday to capture her first LPGA title, taking a four-stroke victory at the Portland Classic in tournament-record fashion.

Chanettee pulled away in the final round to complete an astonishing romp over a stellar field on 26-under 262 after 72 holes at Columbia Edgewater in Portland, Oregon.

The 19-year-old Monday qualifier shattered the former 72-hole Classic mark of 21-under after missing the cut in her prior nine LPGA starts, becoming the seventh LPGA champion from Thailand and only the third Monday qualifier to win an LPGA title.

Filipina Bianca Pagdanganan sizzled with a 69 in the final round but her efforts could only take her to shared 53rd. She finished with a seven-under 281 worth $4,686.

"It's everything to me," Chanettee said as she began to cry. "I missed the cut nine times before this tournament. Then she began to smile."

"I worked very hard to make it happen," she said.

"And it has really happened now."

World No. 367 Chanettee hadn't cracked the top 50 in an LPGA event this year, sharing 51st in Thailand in February and 57th at Superstition Mountain in March.

But with a bogey-free closing round that included seven birdies and an eagle, she took home the $225,000 top prize after winning just over $14,700 in 2023 LPGA prize money until this week.

Being in contention and playing for the biggest title of her career made for nervous moments, Chanettee said, but she kept her cool and dominated with some help from her caddie.

"I always talk with my caddie," she said. "Caddie helped me out a lot. Actually I'm very excited but I can control my mind. I came up calm."

China's Lin Xiyu fired a 64 to finish second on 266 with a third-place pack on 268 including China's Yin Ruoning, American Gina Kim and Spain's Carlota Ciganda with American Megan Khang sixth on 279.

Chanettee, who began the day one stroke behind US 54-hole leader Khang, birdied the third and fourth holes, eagled the par-5 fifth and birdied the sixth and seventh to leap into the lead.