Scottish refs' chief seeks talks with clubs over 'DOGSO' red cards

A similar incident involving Rangers' Mikey Moore being challenged outside the Livingston box by Cammy Kerr in the sides' 2-2 Scottish Premiership draw was also discussed.

No foul was awarded to Rangers but Collum said an on-field review should have taken place, resulting in a free-kick and a red card for Kerr. The incident happened late in the match.

On the same day, Celtic lost 2-1 at home to Hibernian in a match that featured a red card for the hosts' Auston Trusty, which was awarded following a VAR review. Celtic appealed unsuccessfully against the dismissal.

Collum said it was a "clear red card" for "excessive force" towards his marker, Jamie McGrath, at a corner.

In the same game, Celtic claimed unsuccessfully for a penalty following Warren O'Hora's challenge on Liam Scales. Collum said an on-field review and penalty award should have taken place.

Collum agreed with the VAR-awarded penalties for handballs against Rangers' Dujon Sterling in the 2-2 Premiership draw with Celtic, against Partick Thistle's Robbie Crawford in their 2-1 Scottish Cup defeat by St Mirren and against Simon Murray in Dundee's 2-2 league draw with Dundee United.

Reo Hatate's penalty for Celtic was saved but he eventually scored in the aftermath, Dan Nlundulu scored St Mirren's spot-kick against Thistle and United took the lead through Amar Fatah's conversion.

Alex Oxlade-Chamberlain was booked for a challenge on Motherwell's Elijah Just in Celtic's 3-1 home win last weekend.

"We would describe this sometimes as a high-end yellow, orange card," said Collum.

"I know there's people in refereeing who would think this leans more towards a red card.

"Is there something clear here with the images we're seeing that would bring the referee to the monitor to upgrade to a red card? I don't think so.

"But, I could also say that if the referee had given red card on-field, we would've check completed that decision as well."