
Manchester United and Manchester City's meeting at Old Trafford in April 2001 has since become synonymous for Roy Keane's challenge on Alf-Inge Haaland, but the severity of the tackle even shocked those playing in the game.
Tackling the Norwegian knee-high towards the end of the game, Keane received his marching orders during the 1-1 draw. Keane later received an extra five-game ban and £150,000 fine by the FA after the Irishman stated in his autobiography that he intended to "hurt" Halaand (along with some profanities), which was deemed a premeditated assault.