Léolia Jeanjean is a professional tennis player known for her collegiate career and significant breakthroughs in Grand Slam tournaments and WTA events. After reaching the quarterfinals of Les Petits As and the final of the French U14 Championship in 2008, Léolia Jeanjean demonstrated early promise in her tennis career. She was granted wildcards for junior singles and doubles at Roland Garros in both 2009 and 2010, marking her presence at a major tournament from an early stage. Jeanjean further built her foundation through collegiate studies, earning a Bachelor in Sociology from Baylor University and a Bachelor in Criminal Justice from the University of Arkansas, followed by an MBA in Finance from Lynn University in 2019.

Later that year, in November 2022, she continued her upward trajectory as the runner-up at the Montevideo Open. Her career progression continued with her Australian Open debut in 2023. Jeanjean then secured her first WTA 125 doubles title at the MundoTenis Open in Brazil in 2023, partnering with Sara Errani. Demonstrating consistent performance, she reached her first WTA Tour quarterfinal at the Copa Colsanitas in 2025.

Her dedication is further underscored by her career prize money, totaling over $1.4 million.