A poorly timed challenge from Michael Gregoritsch on teammate Ivo Ilicevic angered Ilicevic to the point of headbutting the young winger.

Headbutt aside, Gregoritsch was the one who limped away from the challenge, apparently hurting himself more than Ilicevic. But Ilicevic’s retaliation wasn’t tolerated by manager Bruno Labbadia, who suspended him for Sunday’s match against Cologne as punishment.

Who knew headbutting your own teammates would be frowned upon?

This has been the Dirty Tackle of the Day: a chronicling of unfortunate events.