In heated scenes outside Celtic Park fans confronted each other, in footage exclusively filmed by Daily Star Online.
Police were forced to swoop on the incident and intervene, as fans attempted to get at each other.
One Celtic fan in a black coat was seen being forcefully held back by a cop.
He was attempting to confront a Rangers fan in a red coat, who was also pushed back by police.
Insults including “scummy b******” were hurled in the confrontation.
Rangers fans, waving Scotland and Union Jack flags, were then led away by police.
They had been asked to meet at the Sir Chris Hoy Velodrome for 10.30am.
That was so they could be taken inside Celtic Park for 11am.
Only around 800 Gers fans will be inside the ground for today’s Old Firm clash.
Rangers had initially cut away tickets for Celtic fans from around 8,000 last year.
They said it was due to demand for season tickets.
That led Celtic to do the same, sparking a backlash from some fans.
Steven Gerrard’s Rangers go into today’s game 10 points behind the league leaders.
If they lose, their title hopes will be all but over.