In 2025, Leolia Jeanjean reached her first tour-level quarterfinal in Bogotá, made her WTA 1000 main-draw debut in Montréal, and earned her first WTA 1000 win in Cincinnati (d. Starodubtseva), rising to a career-high No. 91 on August 18. She was also a WTA 125 singles finalist in Colina, and reached the Colina doubles final with Strakhova.