Inbee Park won the Lorena Ochoa Invitational in Mexico City, holding off Carlota Ciganda for her fifth victory of the season and 17th LPGA Tour title.
The second-ranked South Korean star birdied the final two holes for a bogey-free eight-under 64 and a three-stroke victory over Ciganda in cloudy conditions at tree-lined Club de Golf Mexico.
Ciganda shot a 63. The Spaniard eagled the par-five second hole and had eight birdies and a bogey.
Park finished at 18-under 270. She was making her first start since withdrawing in China two weeks ago because of a cyst on her left middle finger.
South Korea's Sei Young Kim was third at 13 under after a 66.