The trouble began when Mattéo Guendouzi, a 27-year-old French midfielder, was involved in several incidents. He initially sparked controversy by giving a middle finger to the Olympique Lyon crowd during the warm-up. Guendouzi, a former Olympique Marseille player, was also seen holding up a camera and saying 'Allez L'OM' after the match. However, it was his confrontation with an Olympique Lyon player that led to a massive melee between Fenerbahçe and Olympique Lyon players. Guendouzi was then attacked by a player from Olympique Lyon, causing a huge commotion. The situation escalated further, resulting in punches thrown and players from both teams involved. The brawl eventually led to a chaotic scene, with players from Fenerbahçe and Olympique Lyon clashing.