Learn more about the American teen's unique background

When Darwin Blanch was just one-week-old, his family packed up in Boca Raton, Florida and moved halfway around the world to Thailand. Yes, you read that right. Blanch, the youngest of four, was one-week-old when he boarded his first long-haul flight.

Blanch’s father, Ernesto, a business executive, accepted a job opportunity in southeast Asia. It was a bold move for the Blanch family.

Blanch laughs, acknowledging he’s never asked his parents what that transpacific journey was truly like with a newborn in tow. Only one could imagine. But nonetheless, Blanch’s first eight years of life spent in Sam Roi Yot — a four-hour car ride from Bangkok — would leave a lasting mark on him. Blanch’s father built a tennis court in their backyard.

“We had our house and then in the backyard, we had a tennis court. It was literally just the court and just a jungle around it, basically,” Blanch exclusively told ATPTour.com. “A lot of trees around it. We had a bunch of hotels next to us, but literally around the court, it was just trees.”

Ernesto also hired an Argentine coach to teach the sport to all four children, with the siblings rotating through their lessons. Blanch, who turned 19 years old on 28 September, would take his turn alongside Ulises (28), Dali (23) and Krystal (21).

All of the Blanch siblings are high-level tennis players. Ulises climbed inside the Top 250 in 2020 and retired from professional tennis last year. Dali is currently the No. 318 player in the PIF ATP Rankings. Krystal has competed for Wake Forest University since 2023, completing her redshirt junior year in May. The siblings' journey began with hours spent together at the backyard court.

"That's where it all started," said the #NextGenATP teen. "That's basically what we did for years. It was just the tennis court, then we had a little water tank to fill up our bottles."

Blanch, not even out of his teenage years, has already lived all over the world: Thailand, a stint in Argentina, a period in Spain at the Juan Carlos Ferrero Tennis Academy and now, back in the United States. The lefty is based in Orlando. Blanch has many fond memories of spending his childhood in Thailand.

“I have a lot of important and good memories there,” Blanch said. “I remember playing tennis with my grandfather. He’s very into tennis, he’s just never played. I don’t think I’ve ever played with him again – just hit some balls with him when I was eight or nine. That was a good memory.

“We had a dog — he passed away now — but I had a lot of good times playing with him in that backyard or when I was on the tennis court.”

The 6’4” heavy-hitting baseliner speaks three languages: English, Spanish and Chinese. He once spoke Thai, but after a decade away from Asia, Blanch has largely forgotten the language.

Watch Blanch play and you may hear him speaking Spanish on court, uncommon for an American. Blanch bounces back and forth between English and Spanish.

“I feel like there’s times on court, I usually say something more in Spanish, probably because my coaches [Mariano Monachesi and Juan Ignacio Chela] are from Argentina,” said Blanch. “With my dad, I mix English and Spanish all the time. We could be in the middle of a sentence speaking English, then out of nowhere we switched to Spanish. My dad is definitely the one I mix the most with.”

Having spent much of his life criss-crossing continents and cultures, are there any lessons that Blanch has learned in his globetrotting journey?

“I saw a lot of different things and I feel like having that really helped me. Especially when you travel — I feel like a lot of people sometimes don’t really want to go to a specific place because they’re like, ‘Nuh uh,’” Blanch said, shaking his head.

“But I’ve seen so many different cultures and lived in so many areas, that it’s definitely helped me travel and I have no issues traveling at all, being able to eat all types of food. I feel like that helped me a lot.”

Blanch earned one of his biggest career milestones this month when he won the ATP Challenger 125 event in Tiburon, California, where he saved five match points in the opening round to stay alive. Five days later, he was lifting the trophy, his first at Challenger level.

Darwin Blanch, the youngest American to win an ATP Challenger 125 title, is crowned champion in Tiburon, California.Darwin Blanch, the youngest American to win an ATP Challenger 125 title, is crowned champion in Tiburon, California. Credit: Natalie Kim

Blanch joined countrymen Learner Tien and Alex Michelsen as the only aged 18-and-under American Challenger champions in the past 10 years. Tien, now solidified inside the Top 20, won three Challenger titles at age 18 while Michelsen captured his maiden crown at that level as an 18-year-old in 2023. Such success helped the California friends qualify for the Next Gen ATP Finals, an event that Tien won in 2025.

Now, Blanch is chasing that same opportunity to compete at the 20-and-under event, which runs from 9-13 December in Reggio Calabria, Italy. Blanch is sixth in the PIF ATP Race to Reggio Calabria.

“It's definitely a big goal for us and it’s something we’re aiming for,” Blanch said of the Next Gen ATP Finals. “If I qualify, obviously that’s fantastic, and if not, we will work and try to get there next year.”