We know the Old Firm clash is one of the world's fiercest derbies, but this isn't the kind of behaviour we want to see.
It was always going to be a powderkeg fixture between Celtic and Rangers when the two clubs met in the League Cup semi-final.
But before the match had even kicked off the rivalry boiled over into violence among two sets of fans who clashed openly in the street.
Footage was captured of Celtic and Rangers fans brawling in broad daylight before Brendan Rodgers' side took on the Mark Warburton's men at Ibrox.
Two sets of supporters were filmed flying at each other, throwing punches and appearing to tear up signs to use as weapons.
Several supporters were floored in the brawl, before a Celtic fan charged down a man swinging what appeared to be a metal sign.
The men were filmed grappling and swinging punches in the middle of the street before the Celtic fans were led away by onlookers.
https://www.youtube.com/watch?v=KGriheGuVfU
It wasn't the only violence to flare up around the knife-edge game, which finished 1-0 to Celtic with a last-gasp winner from Moussa Dembele.
Fans were left soaked in blood after an assault at the Emerald Isle in Glasgow's city centre Gallowgate area where Celtic fans were celebrating their team's victory.
A man suffered a nasty head wound and a woman’s face was cut during the fight at the popular Hoops pub, according to the Scottish Sun.
Police confirmed 18 arrests were made in total around the Old Firm match.
You can catch up on the latest episode of JOE's Football Friday Live right here...
