Police probe Neil Lennon 'race remarks' allegations
Police are investigating allegations that racist remarks were made by Celtic manager Neil Lennon during Wednesday's controversial Old Firm game.
Mr Lennon's lawyer Paul McBride said the allegations were defamatory with no substance whatsoever.
The Scottish Cup replay saw touch-line and tunnel confrontations, 34 arrests inside the stadium and three Rangers players sent off.
The police investigation follows complaints from members of the public.
Mr McBride said: "These allegations are defamatory and outrageous with no substance whatsoever.
"This is a concerted campaign by malicious and despicable individuals to cause distress to Neil Lennon.
"Celtic Football Club and Celtic fans stand by their manager in the face of these vicious and unacceptable attacks."
A high level summit to discuss the Old Firm fixture, which Celtic won 1-0, is to be held next week.
The summit will involve ministers, Rangers and Celtic, the police and football authorities.
A spokesman for Strathclyde Police said: "We have received complaints from members of the public regarding allegations surrounding the events during the Old Firm match on Wednesday, which we are currently investigating."