Roy Keane's outbursts have frequently landed him in trouble over the course of his Manchester United

1998 - Clashes with public

'In the past I was naive. I used to go to night-clubs, drink and go to Kentucky Fried Chicken shops. Unfortunately I did not know people were going to have a go at me. Now I will make sure I know where I am going and who I am going with. '

1999 - Contract offer

'I am not naive enough to settle for anything less than a reasonable valuation of my worth. I want to stay but I won't be frightened to look elsewhere if I feel I have to. '

2000 - Prawn sandwich affair

'Away from home our fans are fantastic, I'd call them the hardcore fans. But at home they have a few drinks and probably the prawn sandwiches, and they don't realise what's going on out on the pitch. I don't think some of the people who come to Old Trafford can spell football, never mind understand it.'

2001 - FAI criticised

'Where we trained last Monday, in Clonshaugh, was abysmal and it has been for as long as I've known it.'

2001 - Red mist at Newcastle

'I rather hoped the penny would have dropped by now, but it seems that is not yet the case. I try to maintain control, try to stay calm. But the red mist sometimes descends - and once that happens 50,000 people would not be able to stop me bursting into a fit of rage. (referring to clash with Alan Shearer below)'

2002 - Players lack desire

'There are a lot of cover-ups sometimes and players need to stand up and be counted. I'm not sure that happens a lot at this club. That's the least we should do. '

2002 - Saipan

'You've seen the training pitch and I'm not being a prima donna. Training pitch, travel arrangements, getting through the bloody airport when we were leaving, it's the combination of things. I would never say `That's the reason or this is the reason', but enough is enough.'

2002 - The autobiography

'I'd waited almost 180 minutes for Alfie. I'd waited long enough. I hit him hard. The ball was there (I think). Take that.'