Teenager Jannik Sinner won the Citi Open in Washington on Sunday to claim the biggest title of his career.
The Italian, 19, beat the USA's Mackenzie McDonald 7-5 4-6 7-5 for his third ATP title.
Sinner also became the youngest winner of an ATP 500 event since the category was created in 2009.
"I'm not looking if I'm the youngest because the road is long," he said. "There's still much work to do. I'm already focusing on next week."
Sinner is the ATP's top-ranked teenager - he came into the tournament as the world number 24 and is set to jump to a career-high 15, with McDonald rising from 107 to 64.