In an off the ball incident 69 minutes into Juventus' 3-0 Coppa Italia win over Roma, Giorgio Chiellini dragged Erik Lamela down to the ground. To Chiellini's surprise, this actually put Lamela in position to retaliate. And he did in the form of a boot to the crotch.
Lamela tried to run away while Chiellini rolled around, but the referee apparently spotted the young Argentine's retaliation and showed him a straight red. And 20 minutes after that, Simon Kjaer topped off Roma's miserable night with an own goal.
Counterbalancing that ugliness was Alessandro Del Piero's beautiful goal in the 30th minute, however. I suggest you watch it.