It’s pretty safe to say Celtic and Rangers fans rarely see eye to eye on anything ranging from football to religion with their bitter rivalry well documented in the history books.
But sometimes fans get a wee bit too excited and try to take matters into their own hands which have resulted in some ugly incidents over the years.
A Celtic fan is the latest addition to that list as he quite needlessly tried to provoke Rangers legend Nacho Novo by singing a horrific chant at the Spaniard as he was making his way out of Belfast International Airport on Saturday evening.
While Nacho was able to laugh off the early exchanges with the Celtic fan, the former Rangers man ended up squaring up with the fan as things went a little too far.
Check out the video below –