|Full name||Abdallahi Mohamed Mahmoud|
|Date of birth||4 May 2000|
|Place of birth||Dar-Naim, Mauritania|
|Height||1.87 m (6 ft 2 in)|
|Playing position(s)||Centre back|
* Senior club appearances and goals counted for the domestic league only and correct as of 20 September 2020|
‡ National team caps and goals correct as of 19:41, 1 June 2020 (UTC)
Born in Dar-Naim, Mahmoud started his career with FC Nouadhibou, first playing for their main squad in 2017. On 8 August 2018, after impressing with the under-20 national team in the L'Alcúdia International Football Tournament, he signed for La Liga side Deportivo Alavés, being initially assigned to the youth setup.
Midway through the 2018–19 season, Mahmoud started to appear with the reserves in Tercera División, and contributed with one goal in 12 appearances (play-offs included) as his side achieved promotion to Segunda División B. On 11 May 2020, he was one of the five B-team players called up to train with the main squad for the remainder of the campaign after the COVID-19 pandemic.
Mahmoud made his first team – and La Liga – debut on 27 June 2020, starting in a 1–2 loss at Atlético Madrid. His next appearance came in a 2–0 loss against Real Madrid, entering as a substitute in the 55th minute.
After representing Mauritania at under-20 level in the 2018 COTIF tournament, Mahmoud was first called up for the full side on 27 August 2018, for a 2019 Africa Cup of Nations qualification match against Burkina Faso. He made his international debut on 8 September, coming on as a late substitute for Abdoulaye Gaye in the 2–0 win.
- Abdallahi Mahmoud at Soccerway. Retrieved 22 June 2020.
- "Abdallahi Mahmoud" (in French). Football Federation of the Islamic Republic of Mauritania. Retrieved 22 June 2020.
- "Abdallahi Mahmoud". National Football Teams. Benjamin Strack-Zimmerman. Retrieved 22 June 2020.
- "#FFRIM OFFICIEL: Abdallahi Mahmoud signe à Alavés!" [#FFRIM OFFICIAL: Abdallahi Mahmoud signs for Alavés!]. Football Federation of the Islamic Republic of Mauritania (in French). Facebook. 8 August 2018. Retrieved 22 June 2020.
- "C.D. Alaves comes back to Ibaia". Deportivo Alavés. 11 May 2020. Retrieved 22 June 2020.
- "Para Glorioso, Llorente" [To Glorioso, Marcos Llorente] (in Spanish). Diario AS. 27 June 2020. Retrieved 28 June 2020.
- "Mauritanie: la liste contre le Burkina Faso" [Mauritania: the full list against Burkina Faso] (in French). Afrik Foot. 27 August 2018. Retrieved 22 June 2020.
- "CAN 2019: le bel exploit de la Mauritanie" [CAN 2019: the great feat of Mauritania] (in French). 2022. 9 September 2018. Retrieved 22 June 2020.
- Abdallahi Mahmoud at BDFutbol