Denmark's Emily Kristine Pedersen edged past Georgia Hall in a playoff hole to win the inaugural Saudi Ladies International title as teenage Australian prospect Stephanie Kyriacou ended another fine week by finishing fourth.
England's Hall let slip a three-shot lead in the closing stages of the tournament on Sunday. She was in control with five holes to play, but bogeyed the 16th and missed an eight-foot birdie putt for the win.
Pedersen, in contrast, sank two birdies in her last five holes to force the playoff after both players ended tied on 10-under par.
Pedersen birdied the first extra hole to claim her third Ladies European Tour crown after her victories at the Indian Open in 2015 and the Czech Open in August.
Kyriacou shot another fine final round of 69 to finish equal fourth on a total of seven-under-par 281.
It was the fifth time in her rookie professional season that the 19-year-old has finished in the top-10.
"I'm very happy that I got to be the first person to win a tournament here and I think it's great we're playing here." – Emily Kristine Pedersen
A measure of her achievement is that Kyriacou is now fourth in the Race to Costa Del Sol, the Tour's order of merit, even having played two tournaments less than each of the trio ahead of her, headed by Pedersen.
"It's very special," Pedersen said of her win.
"I'm very happy that I got to be the first person to win a tournament here and I think it's great we're playing here.
"The country has a bright future in golf and hopefully we'll be back for many years.
"I'm really proud that I got it back twice, I feel like I was out of it at the start of the front nine, then again at the start of the back nine but I kept fighting back."
The event at the Royal Greens Golf & Country Club was the first professional women's golf tournament to be held in Saudi Arabia and the third-highest paying LET event after the British and Scottish Open, with a total prize purse of US$1 million (AU$1.4 million).
Sweden's Caroline Hedwall finished third on eight under, one shot ahead of Dutchwoman Anne van Dam and Kyriacou.