South Korean Hur Mi-jung held off world number one Stacy Lewis to win the LPGA Classic in Alabama by four shots on Sunday.
The win was just the second of Hur's career and comes five years after she won the Safeway Classic as a rookie.
Hur's final-round 66 saw her finish at 21 under, a course record, as Lewis and South African rookie Paula Reto had to settle for second and third respectively.
Lewis also carded a six-under 66 to finish while Reto, who shared the lead with Hur at the end of day three, faded with a disappointing 73, leaving her seven shots off the pace.
"I worked really hard after I struggle with my swing," Hur said.
"I think some days I can win for sure. Today it's the day.
"That [Safeway Classic] was my first win in the rookie year and this... I have been struggling for five years. [But the] last two weeks I felt really good."
Hur starred throughout the tournament and shared the first-round lead with defending champion Lewis after they both shot 64 on Thursday.
Reto shined through the first two days and claimed a three-shot advantage at the halfway point of an event that was scrapped last year but re-introduced for 2014.
But Hur's 67 on Saturday saw her take a share of the lead and she held her nerve with a dazzling final round that included seven birdies.
One shot behind Reto was American Kris Tamulis, who finished at 13 under, while England's Jodi Ewart Shadoff and Thailand's Moriya Jutanugarn were tied for fifth, a further shot adrift.