Roy Keane's criticism of Irish complaints about their defeat in the World Cup play-off against is the latest outburst in what has been a career-long habit.

After getting sent off for stamping on Gareth Southgate in 1995: "He shouldn't be lying on the floor. Defenders shouldn't be on their backsides. I felt that he got in the way."

Keane on the Old Trafford crowd in 2000: "Sometimes you wonder, do they understand the game of football? 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."

On his lunge at Alf-Inge Haaland: "Even in the dressing room afterwards I had no remorse. My attitude was, what goes around comes around. He got his just rewards. My attitude is an eye for an eye."

United finished the 2005 season without a trophy: "Results don't lie and the table doesn't lie. Our performance levels have not been good enough. Everyone at this club needs to look at themselves and ask whether they are giving 100% to the football club."

An exasperated Keane announces he will quit international football after the World Cup having expressed his dissatisfaction with the Republic of Ireland's preparations in Saipan in an interview with the Irish Times. "You've seen the training pitch and I'm not being a primadonna. 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."

On an under-performing Rio Ferdinand: "Just because you are paid £120,000-a-week and play well for 20 minutes against Tottenham, you think you are a superstar.

"It seems to be in this club that you have to play badly to be rewarded. Maybe that's what I should do when I come back. Play badly."

On Trinidad and Tobago football executive and FIFA vice president Jack Warner following a row over the release of Dwight Yorke for international duty: "The man's a clown. He sent me a letter and he was quite happy to give it to the media. I spoke to him and told him what I thought about him and where I think he should go.

"He is writing these letters and it is always under the FIFA heading just to impress everybody.

"If he is vice President of FIFA then God help us. People worry about the game and agents and directors of football and managers losing their jobs - we should be worried about people like him."