Born on 15 May 1997 in Vernon, in the department of Eure, Ousmane Dembélé got his first taste of football not far from his home town, with ALM Evreux and then Evreux FC. In particular, the youngster was able to try his hand at futsal, where he demonstrated above-average technical ability. At the age of 13, Ousmane was spotted by Stade Rennais and made the move to Brittany. Five years later, he signed his first professional contract. Quickly drawing the interest of some of Europe's biggest clubs, the player nicknamed 'Dembouz' impressed on Ligue 1 pitches and was even crowned Ligue 1's Young Player of the Season for 2015-2016. In 29 appearances, he scored 12 goals and provided five assists.
In May 2016, the mercurial, ambidextrous Dembélé joined Borussia Dortmund, with whom he made his Champions League debut. The same year, Ousmane Dembélé also won the German Cup, scoring a goal in the final against Frankfurt. Having scored 11 goals and provided 21 assists, Dembélé left Germany after just one season to join Barcelona on a five-year deal.
Touted as one of the rising stars of world football at the time, the winger was unfortunately hampered by injury in his first season, but nevertheless won the Spanish league-and-cup double. In the space of six seasons, El Mosquito won three league titles, two Copas del Rey and two Spanish Supercups with Barcelona. With the French national team, Ousmane has taken part in the last two World Cups, in Russia and Qatar, the former occasion seeing France claim football's biggest prize, the latter seeing Les Bleus fall to Argentina in the final. In the summer of 2023, Ousmane Dembélé returned to France after seven years away, joining Paris Saint-Germain on a five-year deal.