Léolia Jeanjean (born 14 August 1995) is a French tennis player.
She has a career-high singles ranking of No. 91 by the WTA, achieved on 18 August 2025. Her highest doubles ranking is 162, reached on 18 March 2024.
Jeanjean was a gifted juniors player, but suffered a serious knee injury at age 14.
In 2008, Jeanjean was a quarterfinalist in Les Petits As and reached the final of the French U14 Championship. A league coach was then assigned to spend eleven weeks a year in La Grande-Motte, her home.
In 2009, she received a wildcard at Roland Garros for the junior singles and another for the junior doubles with her partner Darja Salnikova, but she was eliminated in the first round each time. She was invited again in 2010, but did not do better in singles, while in doubles with Clothilde de Bernardi, she reached the quarterfinals.
Jeanjean attended Baylor University (Bachelor in Sociology) and played college tennis at the University of Arkansas (Bachelor in Criminal justice) as well as Lynn University, where she graduated with an MBA in Finance in 2019.
2022: Major debut and third round, top 150
Jeanjean made her Grand Slam tournament main-draw debut at the 2022 French Open, after receiving a wildcard for the singles tournament. She scored her first major match win against world No. 45, Nuria Párrizas Díaz, and then defeated eighth-seed and former world No. 1, Karolína Plíšková, 6–2, 6–2 in the second round. This was her first victory over a player ranked in the top 10. Ranked No. 227, she became the third-lowest ranked player to defeat a top-10 opponent in the season, following No. 409 Daria Saville's upset of Ons Jabeur in Indian Wells, and No. 231 Laura Siegemund's win (via retirement) over Maria Sakkari in Stuttgart. She was also the lowest ranked female player to win a match at Roland Garros against a top-ten opponent, since Conchita Martínez defeated Lori McNeil in 1988. As a result, she reached the top 150 for the first time in her career, climbing up nearly 80 positions.
In November, Jeanjean finished runner-up at the Montevideo Open, losing in the final to Diana Shnaider.
2023: Australian Open debut, first WTA 125 title
On her debut at the Australian Open, she entered this major as a lucky loser, but was beaten in the first round by Nadia Podoroska.
Partnering Sara Errani, Jeanjean won her first WTA 125 doubles title at the MundoTenis Open in Brazil, defeating Julia Lohoff and Conny Perrin in the final.
2024: Another WTA 125 semifinal
Jeanjean qualified for the Australian Open, losing in the first round to Caroline Dolehide. She reached the quarterfinals at the Puerto Vallarta 125, defeating Yanina Wickmayer and Rebecca Marino, before losing to eventual champion McCartney Kessler.
Having qualified for the French Open, Jeanjean was drawn to face top seed Iga Świątek in the opening round and lost in straight sets.
At the Makarska International Championships, she recorded wins over wildcard entrant Tena Lukas and Miriam Bulgaru to make it through to the quarterfinals, where she lost to eighth seed and eventual champion Katie Volynets.
Partnering Kristina Mladenovic, Jeanjean reached the doubles final at the Copa LP Chile, but withdrew before the match due to an elbow injury.
She reached the quarterfinals at the Argentina Open, defeating Francisca Jorge and second seed Suzan Lamens. Jeanjean lost in the last eight to Sára Bejlek. The following week, at the MundoTenis Open, she overcame Daria Lodikova, Nina Stojanović, and Valeriya Strakhova to advance to the semifinals, where her run was ended by seventh seed and eventual champion, Maja Chwalińska.