Real Madrid midfielder Federico Valverde allegedly punched Villarreal's Alex Baena in the car park of the Santiago Bernabeu after Saturday night’s La Liga clash.
Villarreal, who are chasing a Champions League qualification spot in La Liga, secured a memorable and dramatic victory after scoring two goals in the final 20 minutes to beat the defending league and European champions 3-2 in the Spanish capital.
Los Blancos midfielder and Uruguay international Valverde is said to have waited by the Villarreal team bus in the stadium's parking lot after the encounter, before confronting Baena. It is claimed he asked the Villarreal player to repeat what he had said on the pitch before attacking him.