Kaylan Bigun

Kaylan Bigun (born May 23, 2006) is an American professional tennis player. After winning the boys' singles title at the 2024 French Open, he reached a career high ITF junior combined ranking of No. 1 on 10 June 2024.

Early life
Bigun was born in Los Angeles. His father, Dimitry, was born in Ukraine but moved to Los Angeles when he was a teenager. He is Jewish.

A left-handed player, he trains in California and the USTA Center in Florida. His twin brother, Meecah Bigun, is also a tennis player. In January 2024, he signed a letter of intent to play tennis at the University of California, Los Angeles.

Junior career
Bigun represented the United States at the 2022 Junior Davis Cup in Antalya, reaching the final. His twin brother, Meecah, was also on the team. In 2023, he was a reached the singles quarterfinals of Wimbledon and the semifinals of the Junior Orange Bowl.

In 2024, at the Australian Open, he reached the quarterfinals in singles and the semifinals in doubles with partner Jagger Leach. At the French Open, he reached the doubles quarterfinals seeded fourth with Leach. Seeded fifth in singles, he won the title with wins over Viktor Frydrych, wildcard Timeo Trufelli, 12th seed Miguel Tobón Jr., qualifier Henry Bernet, second seed Joel Schwärzler, and Tomasz Berkieta. Bigun became the first American player to win the junior boys' singles title since Tommy Paul in 2015. Following his victory, he became the junior world No. 1, surpassing Rei Sakamoto.

Professional career
In April 2024, Bigun qualified for the main draw of the Sarasota Open.