Gauff won five matches in the main draw, including a quarterfinal victory against top-seeded Kiki Bertens and a win in the semifinals against Andrea Petkovic. Sunday, she knocked off Ostapenko, 22, the 2017 French Open champion.
"I’m still overwhelmed and shocked,” Gauff told reporters at a post-match news conference. “I guess it’s crazy to say it’s my first WTA title.
“My dad told me when I got in, before the first main-draw match, ‘You can’t lose twice in the same tournament.’ I’m sure he never thought it would come this far, to being the champion, but I guess he was right.”