PARIS, May 23 (Reuters) - Ignacio Buse beat ⁠Tommy Paul 7-6(6) 4-6 6-3 in the Hamburg Open final on Saturday to become the ⁠first Peruvian winner on the ATP Tour in nearly 20 years, denying the United ‌States a sweep of the men's claycourt tune-up events ahead of the French Open.

The 22-year-old qualifier captured his maiden tour-level trophy and became the first Peruvian to triumph on the circuit since Luis Horna at the Chilean Open in Vina del Mar ​in 2007, but the match was far from smooth sailing.

In ⁠a see-sawing final, Buse took treatment for ⁠a spell of dizziness early in the clash and trailed 4-0 in the second set which he ⁠lost, ‌before racing ahead in the decider to prevent sixth seed Paul from lifting his second title this season.

"It's emotional for my family," Buse said.

"So many people involved that I cannot describe. ⁠This is for them. I feel extremely happy. It's the best ​feeling in my entire life ‌for sure. I feel incredibly happy.

"I'm also really proud of Peru. It's the best country ⁠in the world, ​so I'm just so emotional now."

Paul's loss came shortly after Learner Tien battled from a set down in Geneva to dismantle Argentine Mariano Navone 3-6 6-3 7-5 and win his second ATP title after Metz in 2025.

The 20-year-old ⁠fourth seed became the youngest American man to win a ​European claycourt title since his coach Michael Chang lifted the French Open crown in 1989 aged 17.

Fellow American Emma Navarro also warmed up for Roland Garros with a timely confidence boost, winning the Strasbourg crown by ⁠beating top-seeded 19-year-old Canadian Victoria Mboko 6-0 5-7 6-2 for the third title of her career.

"It's kind of been a little bit of a rocky year and a half or so, but I think we've put in a lot of really good work," said Navarro, who has battled injury and illness ​this season.

Paul, Tien and Navarro are part of a 37-member contingent of ⁠American players - including qualifiers and wild cards - who are competing in the singles draws at the year's second ​Grand Slam which gets under way in Paris on Sunday.

Buse ‌begins his French Open campaign against Russian Andrey Rublev ​while Paul meets Australian Rinky Hijikata and Tien faces Chilean Cristian Garin. Navarro plays Indonesia's Janice Tjen in the women's draw.

(Reporting by Shrivathsa Sridhar in Paris; Editing by Ken Ferris)