Keys, who has been considered one of the biggest talents in American tennis for much of the decade, showcased during the week a calm, consistent clarity that she has often lacked.

“I think I have known what I need to do in order to play good tennis,” Keys said. “It’s more how to put that all together and how to keep my emotions in check the entire time. I thought I did a good job of that this week.”

Keys’s coach, Juan Todero , said he never lost sight of her potential.

“When we talk, we always know what she’s capable of doing,” Todero said. “So the idea is always there: she’s always right there, and at any moment it can come. Little by little, she’s believing more and playing with more confidence. If she can keep this up, a lot of great things are going to happen for her.”

In her post-victory news conference, Keys spoke with more measured enthusiasm than might be expected from a player who an hour earlier had won the biggest title of her career. The United States Open, which begins next week, was already in her sights.

She has been one of the most consistent players at the Open in recent years, reaching the final two years ago and the semifinals last year.