Kaylan Bigun Bio
Kaylan Bigun is an American tennis player born on May 23, 2006, in Los Angeles, California. A left-handed competitor with a two-handed backhand, he is best known for winning the boys’ singles title at the 2024 French Open, a victory that made him the first American junior boys’ champion at Roland Garros since Tommy Paul in 2015. In June 2024, he reached the No. 1 spot on the ITF junior combined rankings, and on August 18, 2025, he achieved a career-high ATP singles ranking of No. 690.
Early Life and Background
Kaylan Bigun was born and raised in Los Angeles, California, in the United States. His father, Dimitry, was born in Ukraine before moving to Los Angeles as a teenager, and the family is Jewish. Growing up in a sports-oriented household, Bigun was introduced to tennis at a young age and developed his game in California, later adding time at the USTA Center in Florida to his training schedule.
He has a twin brother, Meecah Bigun, who is also a competitive tennis player. The brothers have trained and traveled together, with Meecah joining Kaylan on the United States team at the 2022 Junior Davis Cup in Antalya. Standing 183 centimeters tall, Bigun built his early career on the West Coast before expanding his training base to include the USTA’s national facility in Florida.
Path to Tennis
Bigun’s path into international junior tennis accelerated through the United States Tennis Association’s development system, where he honed his left-handed game and built results on the ITF Junior Circuit. In 2022, he represented the United States at the Junior Davis Cup in Antalya, helping the team reach the final alongside his twin brother Meecah, a run that introduced him to high-level team competition.
In 2023, Bigun reached the singles quarterfinals at Wimbledon in the junior draw and advanced to the semifinals of the Junior Orange Bowl, results that established him as one of the top American juniors of his age group. By January 2024, he had signed a letter of intent to play college tennis at the University of California, Los Angeles, balancing his amateur commitments with a clear plan for long-term development.
Kaylan Bigun Career
Early Career (2022–2023)
Bigun’s first notable international result came at the 2022 Junior Davis Cup, where he represented the United States and reached the final. The following season, he posted strong junior Grand Slam and ITF results, including a Wimbledon junior singles quarterfinal and a Junior Orange Bowl semifinal, both in 2023.
These results earned him seeding status at the major junior events in early 2024. He also gained experience against top European juniors, setting the stage for his breakthrough at the Grand Slams later that spring.
Junior Grand Slam Breakthrough (2024)
Bigun opened the 2024 Grand Slam junior season at the Australian Open, where he reached the singles quarterfinals and the doubles semifinals alongside partner Jagger Leach. At the French Open, he and Leach were seeded fourth in doubles and reached the quarterfinals, while in singles Bigun entered as the fifth seed and won the title in commanding fashion.
His path to the boys’ singles crown included wins over Viktor Frydrych, wildcard Timeo Trufelli, 12th seed Miguel Tobón Jr., qualifier Henry Bernet, second seed Joel Schwärzler, and Tomasz Berkieta. The title made him the first American to win the junior boys’ singles title at Roland Garros since Tommy Paul in 2015, and it lifted him to the No. 1 spot on the ITF junior combined rankings on June 10, 2024, surpassing Japan’s Rei Sakamoto.
Pro Tour Transition (2024–2025)
In April 2024, Bigun made his first appearance in an ATP Challenger main draw by qualifying for the Sarasota Open, marking his transition from the junior circuit to the professional ranks. He also contested the 2024 US Open men’s singles qualifying draw, reaching the first round of qualifying.
On the doubles side, he reached the second round of the 2024 US Open mixed doubles. By August 18, 2025, he had climbed to a career-high ATP singles ranking of No. 690, and as of November 10, 2025, he was ranked No. 736. His career prize money on record stands at US $51,186.
Driving Style and Strengths
Bigun plays left-handed with a two-handed backhand, a combination that allows him to generate sharp angles and dictate play from both wings. His training across California and the USTA Center in Florida has given him experience on a variety of hard and clay surfaces, and his comfort in extended rallies has translated well from junior to professional events.
Notable Events and Milestones
His signature achievement remains the 2024 French Open boys’ singles title, a result that ended a nine-year American drought at the junior level and made him the ITF junior world No. 1. Reaching the ATP top 700 in 2025, at age 19, marks another significant step in his young professional career.
Kaylan Bigun Career Wins
Bigun’s most prominent title is the 2024 French Open boys’ singles championship, a junior Grand Slam crown that stands as the headline of his career. Beyond the junior Slams, he has compiled consistent results on the ITF Junior Circuit and reached the main draw of an ATP Challenger event at the 2024 Sarasota Open.
Junior Grand Slam Highlights
Bigun captured his first and only junior Grand Slam singles title at the 2024 French Open, capping the run with a straight-sets victory over Tomasz Berkieta in the final. He followed that win with a quarterfinal appearance at the 2024 Australian Open juniors and a quarterfinal at Wimbledon juniors in 2023, making him a regular presence in the second week of the junior Slams.
Other Wins & Performances
On the team side, Bigun helped the United States reach the final of the 2022 Junior Davis Cup in Antalya. In 2023, he reached the semifinals of the Junior Orange Bowl, and he has added multiple ITF junior doubles results, including a semifinal at the 2024 Australian Open with Jagger Leach and a quarterfinal at the 2024 French Open in doubles.
Kaylan Bigun Family
Family Background and Racing Lineage
Kaylan Bigun comes from a family with Ukrainian-American roots. His father, Dimitry Bigun, was born in Ukraine and moved to Los Angeles as a teenager, settling in Southern California, where Kaylan and his twin brother Meecah were born and raised. The family is Jewish, and Dimitry has been a steady presence in his sons’ tennis development.
Personal Life
Bigun’s twin brother, Meecah Bigun, is also a tennis player and has competed alongside Kaylan at events such as the 2022 Junior Davis Cup. Outside of competition, Bigun has committed to playing college tennis at the University of California, Los Angeles, balancing his ATP-level schedule with his long-term academic and athletic plans.
2025 Season Performance
Kaylan Bigun’s 2025 season has been defined by his continued climb into the ATP rankings, reaching a career-high No. 690 on August 18, 2025. After transitioning from the junior circuit in 2024, he has spent most of 2025 grinding on the ITF and lower-tier Challenger circuits, with the goal of breaking into the ATP top 500 and qualifying for main-draw Grand Slam events.
By November 10, 2025, he held an ATP singles ranking of No. 736, reflecting the natural fluctuation that comes with a young player’s first full professional season. His prior experience on clay, built during the 2024 French Open junior title run, remains a strength heading into the 2026 clay swing.
With college tennis at UCLA waiting in the wings, Bigun and his team will weigh entry into the 2026 Australian Open qualifying and a return to the French Open junior and main-draw qualifying events. The momentum from his ATP ranking gains in 2025 sets a clear foundation for a more competitive 2026 campaign.