In a gripping play-off match on May 11, 2025, Flénu secured a 2-1 victory over Sporting Bruxelles at Terrain Rue des Produits. The home side took control early in the game, managing to score twice before the visitors found the net. Despite Sporting Bruxelles' efforts to equalize, Flénu held on to their lead, clinching a crucial win in the Third Amateur Division play-offs.