Russia's Anastasia Pavlyuchenkova shocked world number one Angelique Kerber to win her fourth Monterrey Open title in Mexico.
The world number 16 won 6-4 2-6 6-1 to secure the ninth title of her career.
Pavlyuchenkova, 25, took the opening set with the only break and, after Kerber levelled, raced into a 5-0 lead in the deciding set before winning in one hour and 55 minutes.
Germany's Kerber is yet to win her first title of 2017.