The Swedish golfer Pernilla Lindberg made her first LPGA victory a major when she won a marathon playoff at the ANA Inspiration in California.
World number 95 Lindberg completed a big upset when she rammed home a 25-foot birdie putt to beat South Korean Park In-bee at the eighth extra hole.
Lindberg's winning putt slammed against the back of the cup at speed and fell in at the par-four 10th.
Park then missed a 15-foot birdie chance that would have extended the playoff.
Lindberg's unlikely victory came after the 31-year-old slept on the lead four nights in a row.
"I just know I'm a grinder and towards the end yesterday I just felt this is mine. I'm kind of due this," Lindberg, 31, told Golf Channel.
"I just looked at every day as just the same thing again, and even today, I felt like I went out and did my same routine. I just felt so calm and I felt this could be mine."
Even so, she was as surprised as anyone when her winning putt disappeared into the hole.
"I couldn't believe when that last putt went in," she said.
The playoff was forced into Monday because darkness halted play on Sunday night after four extra holes.
What started as a three-way playoff was whittled down to two when American Jennifer Song was unable to match the birdies by Park and Lindberg at the third extra hole.
Lydia Ko finished tied for 20th.