After dropping the first set, the Russian lost just two games the rest of the way against the world No. 5.

The American won her ninth career title in three sets, 6-3,, 4-6, 6-1.

"Even when I practice with her, she'll throw in the underarm serve. I thought for sure that was coming at some point," Pegula said after a 7-6(4), 6-3 win.