Celtic have declared themselves satisfied with their players' behaviour after a chaotic Old Firm match sparked questions in the Scottish Parliament.
Both clubs have been summoned to a meeting with Scottish Government and police officials following Celtic's 1-0 Scottish Cup win, which saw Rangers trio Steven Whittaker, Madjid Bougherra and El-Hadji Diouf sent off.
The match ended with Celtic boss Neil Lennon reacting furiously to something said by Rangers assistant Ally McCoist.
Rangers have claimed the tension was caused by 'extreme verbal abuse' directed towards two of their players in previous Old Firm fixtures.
But Lennon believes his team's ability to remain calm was the key to setting up a Scottish Cup quarter-final at Inverness.
'We tried to play football throughout the game and, over and above that, I was delighted that, in such an atmosphere, the team remained composed and disciplined during what was, at times, a difficult game,' Lennon told www.celticfc.net.
Lennon also tried to defuse his row with McCoist, who takes over as Rangers manager in the summer.
'We've both got a lot of experience of this fixture and know that sometimes, in the heat of the moment, things can be said and words exchanged,' the Celtic boss said.
'It is a passionate game and both of us want our team to win. However, we were still able to sit down after the game and, as far as we are concerned, the matter is closed.'
The game will be the subject of an investigation by Scottish Football Association chief executive Stewart Regan, who hit out at the 'inflammatory and irresponsible behaviour throughout'.
But Celtic chief executive Peter Lawwell took issue with elements of Regan's statement.
'Celtic had three players booked,' said Lawwell.
'To put this in the context of other matches, St Johnstone received two bookings in their match against Aberdeen, while Motherwell received five bookings against Celtic last Sunday.
'Contrary to Stewart's statement I do not think that our players showed a lack of respect to officials.'
While some attempts were being made at easing the tension between the teams, Celtic captain Scott Brown aimed another verbal blow at Diouf.
The midfielder, writing on www.talentnation.com, said: 'Diouf was obviously trying to wind the boys up throughout the game and he even had a pop at me at half-time.
'To be honest with you, I didn't even know what he said because our fans were chanting so loudly. But I doubt it was anything flattering!
'That's three Old Firm games he's played in now and he's not really done anything to change the game.
'I know he's played in derbies down south, but the Old Firm clashes are different to anything any player can experience.'
