Massadio Haïdara is a professional footballer who plays as a left-back for Ligue 1 club Lens. Born in France, he plays for the Mali national team.

Racing Club de Lens, commonly referred to as RC Lens or simply Lens, is a French professional football club based in the northern city of Lens in the department of Pas-de-Calais. The club's nickname, Les Sang et Or, comes from its traditional colours of red and gold. As of the 2023–24 season, Lens competes in Ligue 1, the highest tier of French football.