Real Madrid midfielder Luka Modric was hit in the head by an item thrown from the stands of Estadio El Sadar as they celebrated Isco's goal in victory at Osasuna.
The ex-Malaga player ran towards the corner flag where Los Blancos substitutes were warming up after scoring the lead-taking goal, so his teammates gathered around him.
Suddenly, Modric left the huddle in apparent pain, victim of an object tossed by a disrespectful supporter, says Marca.
Both he and Lucas Vazquez started verbally reprimanding the crowd.
Immediately after, the Osasuna speaker urged the home fans to respect both the opponents and the referee.