Mamadou Selu Diallo (born 1 October 2003) is a professional footballer who plays as a midfielder for Atlético Madrid B, on loan from Deportivo Alavés.
Born in Huesca, Aragon, Diallo was an IPC La Escuela youth graduate.
[5] Diallo made his first team debut with the Babazorros on 2 November 2023, starting in a 10–0 away routing of Deportivo Murcia FC, for the campaign's Copa del Rey.
[6] He made his professional debut the following 16 January, coming on as a second-half substitute for Antonio Blanco in a 2–0 loss at Athletic Bilbao, also for the national cup.
[7] On 17 July 2024, Diallo was loaned to Primera Federación side Atlético Madrid B for the season.