When it comes to fighting between two sets of supporters, we reckon soccer has got the world licked. Hell, the sport's even kickstarted a war.
But in the US two men have taken the Kentucky-Louisville sporting rivalry to another level, getting into a fist fight during treatment at a dialysis clinic.
Cops arrived at the clinic in Georgetown, Kentucky after local basketball fan Ed Wilson and Louisville fan Charles Taylor duked it out ahead of Saturday's Final Four meeting between the two teams in the NCAA.
"I think this is a first at a dialysis center," Lt. Robert Swanigan told Fox News.
Wilson, who was getting treatment when the ruckus kicked off took, reckons Taylor was talking trash about how Louisville would beat the Wildcats.
"That's what started it," he said.
But Taylor, who was waiting for treatment at the time, saw it differently.
"I didn't talk to him about the ball game. I was talking to another guy about the game," Taylor said. "[Wilson] was meddling and told me to shut up and gave me the finger.
"I wasn't gonna take no more from him. I went up to him and I hit him. Didn't hit him that hard, but I hit him."
Wilson, restricted because of the treatment, said it was difficult to retaliate.
"I'm sitting there hooked up to a machine and I can't do anything," he said.
Wilson said he was sorry the incident happened and that he hoped Taylor "won't attend clinic at the same time as me anymore."
Fox says Wilson, who will not be filing charges, said a Wildcats win would be all the justice he needed.