Sir Alex Ferguson revealed in his book how Ruud van Nistelrooy's foul-mouthed tirade during the 2006 League Cup final was the catalyst for his Manchester United exit.
The Dutch striker scored 150 goals in 219 appearances during five successful seasons at Old Trafford, but his time in England came to a bitter conclusion after he let his frustration boil over, when he was overlooked as a second-half substitute.
Van Nistelrooy was named on the bench against Wigan Athletic at Cardiff's Millennium Stadium, after Ferguson decided that Louis Saha - who had played in each of the previous rounds - deserved to start as Manchester United's main striker for the showpiece final.
And, in the closing stages of the game, the decision to introduce new signings Nemanja Vidic and Patrice Evra instead of Van Nistelrooy sparked a furious reaction from the talisman.
"I turned to Ruud and said 'I'm going to give these two lads (new signings Vidic and Evra) a part of the game'" Ferguson recalled. "'You ******' said Van Nistelrooy. I'll always remember that. Could not believe it.
"Carlos Queiroz turned on him. It became fractious in the dugout. Other players were telling him 'Behave yourself'."
Van Nistelrooy's behaviour deteriorated even further during the final few months of the season, so much so that he was left out of Manchester United's match day squad completely on the final day of the 2005/06 campaign, and was later sold to Real Madrid.
In light of Van Nistelrooy's angry altercation with Ferguson, GiveMeSport remembers five of the best player-manager disputes. Click through the tabs - above or below - and share your favourite incident in the comment box provided!