[5][6] His uncle Christophe Legoût is a former member of French national team, and Alexis' younger brother Félix Lebrun is also a table tennis player.

[7] Alexis Lebrun became the junior national champion of France in singles table tennis in 2020 and repeated his success in 2021.

[11] In April 2023, he won in 5 sets against then number 1 tennis player in the world Fan Zhendong in the quarter-finals of the Macao tournament.

[13] In June 2023, at the European Games, Alexis Lebrun won the bronze medal at the men's singles table tennis event.

[14] In February 2024, as part of the French men's national team, Alexis took part in the 2024 World Team Table Tennis Championships in Busan, South Korea (with Félix Lebrun, Simon Gauzy, Jules Rolland and Lilian Bardet).