The Scottish Football Association has been asked to rule on an incident involving Celtic defender Glenn Loovens and Rangers ace Maurice Edu.
The pair clashed during Saturday's Old Firm derby, with Edu left in a crumpled heap on the floor as a result of their collision.
Dutchman Loovens appeared to catch his American opponent with his studs when making a clearance during the Hoops' 1-0 defeat at Ibrox, and the SFA is now set to investigate the incident.
"Referee Craig Thomson confirmed he did not witness the incident so it has been referred to a review panel to determine whether or not the player has a case to answer in terms of his alleged misconduct," said an SFA spokesman.
Loovens could face a possible suspension as a result of his actions, but will not be forced to sit out any of Celtic's remaining three games of the season.
The review panel are set to meet this week to discuss the matter, but that meeting will not determine a punishment.
The matter will either be thrown out or referred to a disciplinary committee that are not set to reconvene until the end of the current campaign.