90, following two ATP Challenger Tour titles in Spain in July 2022 and two more finals in the same year.

In September 2022, Lestienne reached his first quarterfinal on the ATP Tour at the San Diego Open defeating Brandon Holt and sixth seed Alejandro Tabilo.

[6] Lestienne followed this by reaching his first semifinal at the 2022 Tel Aviv Open defeating seventh seed compatriot Adrian Mannarino,[7] Emil Ruusuvuori[8] and fourth seed Maxime Cressy in the quarterfinal, his first win against a player in the Top 50.

[9] At 30 years old, he made his Grand Slam debut in singles at the 2023 Australian Open and won his first Major match defeating Thiago Monteiro.

In February, Lestienne reached his first ATP Tour doubles final at the Qatar Open, playing along Botic van de Zandschulp losing to Rohan Bopanna and Matthew Ebden in the finals.

He also made his debut at the Italian Open but also retired after one set in the first round against Laslo Djere.

On his debut at the 2023 French Open he lost in the first round to 11th seed Karen Khachanov.