Britain's Johanna Konta beat seven-time Grand Slam champion Venus Williams to win her first WTA title in Stanford.
Konta, 25, won 7-5 5-7 6-2 in California to join Heather Watson as a British winner on the WTA Tour in 2016.
Sue Barker was the only previous British winner in Stanford, beating Virginia Wade in the 1977 final.
British number one Konta - ranked 147th last June - will rise from 18th to a career high 14th when the new world rankings are confirmed on Monday.
She reached the semi-finals of the Australian Open in January, and again at Eastbourne in June.