Canada's Leblanc delivers season-best performance finishing tied for 4th at JTBC Classic

Atthaya Thitikul won the JTBC Classic on Sunday for her first LPGA Tour title, three-putting for bogey on the second hole of a playoff to outlast Nanna Koerstz Madsen.

"It's just crazy in my mind right now," Thitikul said. "I cannot believe that I became LPGA winner. It's feel amazing as well."

Canada's Maude-Aimee Leblanc finished tied for fourth for her best performance of the season. Leblanc, of Sherbrooke, Que., shot a four-under 68 round.

After Koerstz Madsen's 15-foot bogey putt hit the edge of the cup and stayed out away, the 19-year-old Thitikul rolled her 10-foot par try close and holed out for the breakthrough victory.

"A lot things going through my head," Thitikul said. "But one thing that I really want to focus is like just, 'Do your [best] every single shot... Just like, 'If you lose, if you win, this is another chance to learn. So do your best every single shot... That's it."

WATCH | Leblanc delivers standout performance:

At 19 years, 25 days, Thitikul is the youngest winner on the LPGA Tour since Brooke Henderson in the 2016 Portland Classic at 18 years, nine months, 23 days. The Thai player also has two victories on the Ladies European Tour.

Koerstz Madsen lost two weeks after winning a playoff in Thailand to become the first Danish champion in LPGA Tour history.

They matched pars on the first extra trip down 18, with Thitikul missing an eight-foot birdie try. Koerstz Madsen drove left on the second playoff hole and hit her second from an awkward stance near the cart part into the greenside water.

"It's a hard shot," Koerstz Madsen said. "It's a hybrid from the rough — not a very good lie, above the feet. I just tried not to pull it too much from that lie, and then obviously I did not pull it. I pushed it