Started playing tennis at age three, hitting backhands in the garage.
Father, Erik, is a lawyer and played college tennis at the University of Redlands, where he was a three-time All-American.
Mother, Sondra, is a retired teacher and played college tennis at San Diego State University, where she earned the prestigious Arthur Ashe Award for Leadership and Sportsmanship in 1989.
Says his mother has inspired him the most: "She taught me how to play and I was hitting with her almost every day until I was 15 or 16. My earliest tennis memory was when I was four and it started raining and I was crying to her because I couldn't play."
Brother, Jake, is three years older.
Favourite surface is hard and shot is backhand.
Favourite tournament is Wimbledon and city on tour is Paris.
Believes that winning the 2022 Wimbledon boys' doubles title, with countryman Sebastian Gorzny, has had the biggest impact on his young career: "Holding a Wimbledon trophy, even juniors, was super cool for me. I never thought that would happen. By far my favourite moment in tennis."
Tennis idol is Gael Monfils.
Enjoys playing basketball and is a fan of the Los Angeles Lakers.
Favourite athlete is Lionel Messi.
Biggest passion outside tennis is coin collecting. Owns over $10,000 in various coins.
Favourite book is Harry Potter, movie is Star Wars, TV show is Family Guy and actor is Tom Cruise.
Guilty pleasure is 'sweets'.
Favourite school subject is history.
Says his best quality is that he's 'caring' and worst quality is being 'too competitive'.
(UPDATED 24 MAY 2025)
Broke inside Top 50 in August 2024 and achieved career-high No. 32 in March 2025 soon after defeating former finalist Tsitsipas en route to 1st Grand Slam 4R at Australian Open.
Earned 1st ATP Tour win and reached 1st QF, SF and final at 2023 Newport, becoming youngest American ATP Tour finalist since Fritz at 2016 Memphis.
At 2024 Australian Open, became the youngest American man in Grand Slam 3R since Young at 2007 US Open, reaching 3R.
Also advanced to ATP Tour finals at 2024 Newport, where he held 1 MP vs. Giron, and 2024 Winston-Salem.
Defeated No. 9 de Minaur for biggest win of career in 2024 Los Cabos 2R, before squandering 3 MPs in QF against eventual champion Thompson.
Also reached 2024 ATP Masters 1000 Cincinnati doubles final w/McDonald after defeating him in qualifying.
Qualified for Next Gen ATP Finals presented by PIF in 2023 and 2024.
Reached career-high No. 25 in ITF Juniors, highlighted by 2022 Wimbledon boys’ doubles title w/Gorzny.