A "furious" Juventus team were ready to take out their frustrations on Real Madrid's players following their exit from the UEFA Champions League on Wednesday.
The Serie A side had battled back from a 3-0 loss in the first leg to pull level with the Spanish giants at the Bernabeu and the tie looked set for extra time when disaster struck for Juventus.
Medhi Benatia was adjudged to have taken down Lucas Vazquez in the penalty box as the Madrid winger attempted to get on the end of a Cristiano Ronaldo header back across the area.
Referee Michael Oliver was immediately surrounded by Juventus players, with Gianluigi Buffon sent off before the spot kick could even be taken.