According to L'Équipe, Ismaël Doukouré was excluded from the Strasbourg squad for the first matchday at Metz in 2025 after refusing to extend his contract, which was due to end in 2026. On August 20, 2025, he signed a new contract with Strasbourg until June 2028, which included a substantial salary increase to 250,000 euros gross per month.

Ismaël Doukouré, the 22-year-old versatile French defender, was initially left out of Strasbourg's professional squad because he refused to extend his contract, which was due to expire in June 2026. However, it has been reported by journalist Fabrizio Romano that Doukouré and Strasbourg have now reached an agreement on a contract extension that will keep him at the club until June 2028. The contract renewal was significantly influenced by Strasbourg's coach Liam Rosenior and the club's owner BlueCo, who also owns Chelsea. Following this extension, Doukouré is anticipated to quickly rejoin Strasbourg's squad. The defender, who has been associated with a potential transfer to Chelsea, currently has a market value of €18 million, as per Transfermarkt.