Republic of Ireland manager Martin O'Neill has urged his assistant Roy Keane to end his public feud with former Manchester United boss Sir Alex Ferguson.
After years of working together at Old Trafford, Keane and Ferguson have both hit out at each other in recent autobiographies, but O'Neill believes it is time to bury the hatchet once and for all.
"Manchester United have been incredibly successful and these men were two fundamental factors in this," he told the Guardian. "The manager's obviously very important, having been able to oversee success for such a considerable amount of time. To stay at any football club for such a length of time is incredible; to stay at a club like Manchester United that was demanding then sustaining such success is even more so.
"Roy Keane was a vital cog in that. If you were to ask Sir Alex Ferguson, I'd bet one of the top three or four signings he made would be Roy Keane. And he signed some very fine players. That's how important Roy was to him.
"The two of them were brilliant for each other over a number of years and I think that's something that shouldn't be forgotten over time. People can have their arguments and who am I to step into anyone else's argument, who am I to intervene?
"I'm not [doing] that, but what I maintain is that the two of them were magnificent for each other and from an outsider's viewpoint it'd be nice, if at some stage or another, they recognise that publicly. I know that deep down they know they were superb for each other."