After Osasuna's surprising victory over Real Madrid with a score of 2-1 in La Liga, chaos erupted at El Sadar Stadium, leading to clashes between fans and police. Reports indicate that two fans were arrested as they became involved in confrontational incidents within the stadium premises. The altercation began when an Osasuna fan threw a small bottle at Real Madrid's goalkeeper, Thibaut Courtois, prompting the referee to take action against the disturbance.

As the match concluded, security personnel attempted to identify the individual responsible for the bottle-throwing incident. However, they were met with significant resistance from a group of reportedly zealous fans who objected to the intervention of security staff, resulting in additional altercations and minor injuries among those present. Eyewitness accounts detail a scene of disarray, illustrating the intense atmosphere in the aftermath of the match and how quickly it turned violent.

This incident reflects broader issues related to crowd control and fan behavior in sports events, particularly in high-stakes matches like this one against Real Madrid. The authorities will likely need to enhance their security measures at future games to prevent similar volatile situations from arising, ensuring both players and fans are safe during these sporting events.