Moussa Diaby (born 7 July 1999) is a French professional footballer who plays as a winger or attacking midfielder for Saudi Pro League club Al-Ittihad and the France national team.

[3] Coming from a Malian family, Moussa Diaby began playing football at Espérance Paris in the 19th arrondissement, at the Jules-Ladoumègue sports center in the under-10 category, where he remained until the under-14 level.

[7] Continuing his good performances the following season, especially in the UEFA Youth League, he was voted Titi d'Or by his training center teammates.

Present on the bench for the first team in the following weeks, he made his professional debut on April 14 against Genoa CFC, coming on with eight minutes remaining.

Initially, a new loan to Montpellier HSC or Real Sociedad was considered, but the new Parisian coach Thomas Tuchel decided to keep Moussa Diaby at the club.

He went on to make 25 Ligue 1 appearances in 2018–19, scoring four times across all competitions and averaging an assist every 190 minutes during the club's successful title defence.

[16] In June 2019, Moussa Diaby was transferred to Bayer Leverkusen for 15 million euros excluding bonuses[19] and a resale percentage (20%) for Paris Saint-Germain.

[20] After five substitute appearances,[21] the international hopeful started his first match as a starter against SC Freiburg in November, where he shone with his speed and scored his first goal in Germany during a draw (1-1).

[20][verification needed] By the end of January 2021, Moussa Diaby had three goals and four assists in 17 league starts, as well as a brace in a 4–1 win over Eintracht Frankfurt in the DFB-Pokal.

[24] By mid-April, his team was no longer in the title race but was competing for qualification for European competition, and Moussa Diaby contributed with an assist and a goal against Cologne (3-0).

[29] On 27 July, Diaby scored minutes after coming on as a substitute in a 2–0 pre-season victory over Fulham in the Premier League Summer Series in the United States.

[32] On 24 July 2024, after just one season in England, Diaby moved to Saudi Pro League club Al-Ittihad in a deal reportedly worth around €60 million.