Lucas Tousart

Valenciennes

Tousart made his debut for the Ligue 2 side on 24 January 2015 against Tours. He played the whole match in a 2–1 home loss.

Lyon

Tousart made his Lyon debut on 5 December 2015 in a Ligue 1 match against Angers. He was replaced by Clement Grenier after 61 minutes in a 2–0 home loss. He scored his first professional goal on 16 February 2017 in a UEFA Europa League game against Dutch side AZ Alkmaar, scoring the first goal in an eventual 4–1 victory.

Hertha BSC

On 27 January 2020, Tousart signed with Bundesliga side Hertha BSC. He was however sent back to Lyon on loan until the end of the season. While on loan to Lyon, Tousart volleyed in the game's only goal as Lyon shocked Juventus in the first leg of their Champions League Round of 16 tie. It was announced in June 2020 that Tousart would join Hertha on 1 July, meaning that Tousart would be unable to take part in Lyon's postponed Champions League match following the COVID-19 pandemic.

Union Berlin

On 19 July 2023, Tousart joined Hertha BSC's local rivals Union Berlin. On 16 September 2023, he made his debut for the club in a 1–2 away loss to VfL Wolfsburg, coming on as a substitute in the second half.

Brest

On 1 September 2025, Tousart signed with Ligue 1 side Brest.

As of match played 17 May 2025

Lyon

Coupe de la Ligue runner-up: 2019–20 France U19

UEFA European Under-19 Championship: 2016 Individual

UEFA European Under-19 Championship Team of the Tournament: 2016