Willie Collum has found himself as public enemy No.1 among the Roma faithful after a late penalty decision denied the Italians of all three points in the Europa League.
READ MORE - Celtic v Lazio LIVE: Neil Lennon makes surprise inclusion in squad to face Italians as team is announced
The home side were leading 1-0 in stoppage time against German visitors Borussia Monchengladbach when Collum pointed to the spot.
The Scottish referee adjudged Chris Smalling to have blocked a late shot with his hand, though replays showed it hit him in the face.
Smalling and his team-mates were aghast at the decision and had to watch on as Lars Stindl levelled in the match in the 95th minute.