Massimiliano Allegri defended Gianluigi Buffon's reaction after the Juventus captain and goalkeeper was sent off for protesting Real Madrid's stoppage-time penalty in the Champions League.
Juventus were eliminated 4-3 on aggregate in the quarter-finals, despite Wednesday's 3-1 victory over Madrid, who benefited from a dramatic last-gasp penalty at the Santiago Bernabeu.
Buffon and Juve were poised to force extra time after remarkably erasing Madrid's 3-0 first-leg lead, until Cristiano Ronaldo broke their hearts with a spot-kick at the death.
Two-time reigning champions Madrid were awarded a penalty after Lucas Vazquez was fouled by defender Medhi Benatia, sparking a furious protest from Buffon, who was shown a red card having confronted referee Michael Oliver.