Scottish Premiership referees will once again be under the microscope as Celtic and Rangers clash in the east end of Glasgow this Saturday (kick off: 12pm).
With fans of both teams desperate for three points in order to aid their title challenge, every decision will be magnified as the battle to be crowned champions of Scotland hits fever pitch.
Willie Collum has been handed the task of officiating this weekend’s mammoth clash at Celtic Park and will take charge of the 11th Old Firm fixture of his career. But how does he compare to other Scottish Premiership officials this season in terms of handing out yellow and red cards?
Who is card happy and who has not yet issued a red card all season? Using soccerbase.com, we rank every Scottish Premiership referee that has taken charge of 10 games or more by awarding one point for each yellow card given out and three points for each red.
9. David Munro - 55 points
In the 14 games Munro has managed this term, he has awarded 46 yellows and three reds, which offer him a 3.29 per game average for yellow cards. His red card average stands at 0.21 per game. | SNS Group Photo: SNS Group
10. Colin Steven - 42 points
Despite taking charge of just eight games this year, Steven has a card average higher than most. His season total is 36 yellow and three reds. He awards an extremely high average of 4.5 yellows per game and his 0.37 average for red cards awarded is a league high in the Scottish Premiership. | SNS Group Photo: SNS Group
11. Steven McLean - 38 points
Referee Steven McLean was the official at the recent Scottish Gas Scottish Cup semi-final match between Rangers and Hearts at Hampden Park. He has awarded 32 yellows and two reds during his 10 Scottish Premiership games as the man in the middle. He averages 3.2 yellows per game and 0.20 red cards. | SNS Group Photo: SNS Group
12. Alan Muir - 34 points
Referee Alan Muir has taken charge of 10 games this season. In total, he has awarded 31 yellow cards and one red - an average of 3.10 yellows and 0.10 reds per game. | SNS Group Photo: Roddy Scott - SNS Group