Jérôme Kym Bio
Jérôme Cyrill Kym is a Swiss professional tennis player born on 12 February 2003 in Rheinfelden, Switzerland. He has made a significant mark in the ATP circuit with a career-high singles ranking reaching No. 123 as of 19 May 2025. Kym has also represented Switzerland in the Davis Cup, showcasing his skills on the international stage. He turned professional in 2019 and quickly progressed in his career, achieving notable milestones such as his first Grand Slam appearance at the US Open in 2025.
Early Life and Background
Jérôme Kym was born and raised in Rheinfelden, Switzerland. Growing up in a country known for its rich tennis tradition, Kym was exposed to the sport at an early age. His passion for tennis developed through local clubs and competitions, where he honed his skills and competed against peers. Kym’s height of 1.98 meters (6 feet 6 inches) gave him a natural advantage on the court, allowing him to develop a powerful serve and strong baseline game.
Path to Tennis
Kym began his formal training in tennis during his childhood, participating in various junior tournaments across Switzerland and Europe. His dedication and talent were evident early on, leading to significant achievements in the junior circuit. He gained valuable experience and mentorship from established players and coaches, which helped him transition into professional tennis. His commitment paid off when he turned professional in 2019, marking the beginning of his journey on the ATP Tour.
Jérôme Kym Career
Early Career (2019-2023)
Kym made his professional debut in 2019 and quickly began to make a name for himself. His early years were marked by participation in various ATP Challenger and ITF events, where he began to build his ranking and experience. In February 2019, he made his Davis Cup debut, partnering with Henri Laaksonen to secure a victory against the Russian duo of Evgeny Donskoy and Andrey Rublev. This early success set the stage for his future endeavors on the ATP circuit.
Breakthrough (2024-2025)
Kym’s breakthrough came in 2024 when he won his first Challenger title at the UniCredit Czech Open, defeating Tseng Chun-hsin. This victory propelled him into the top 200, reaching a ranking of No. 181 by July 2024. He continued to build on this momentum, qualifying for his first ATP main draw at the Swiss Indoors in Basel, although he faced a tough match against fifth seed Ugo Humbert. His significant achievements culminated in 2025 when he reached a career-high ranking of No. 123 after the Italian Open.
Notable Works and Milestones
Kym’s notable achievements include his first Grand Slam appearance at the 2025 US Open, where he made an impressive run to the third round. He defeated Ethan Quinn for his first major win and then achieved a stunning upset against 30th seed Brandon Nakashima in a five-set match. Although he was eliminated in the third round by world number four Taylor Fritz, Kym’s performance earned him approximately 237,000 US dollars in prize money, marking a significant milestone in his career.
Jérôme Kym Award Nominations
Throughout his career, Jérôme Kym has been recognized for his achievements in the sport of tennis, particularly during his rise in the ATP rankings. His performances in various tournaments have garnered attention, and he continues to be a promising talent in Swiss tennis.
Jérôme Kym Awards Won
As of now, Jérôme Kym has not yet won any major awards but has achieved significant milestones in his young career, including Challenger titles and notable performances in Grand Slam events. His journey in professional tennis is still in its early stages, and he is poised for future success.




