Roy Keane has questioned Sir Alex Ferguson's decision to publicly criticise several of his former players.
Extracts from Ferguson's new book 'My Autobiography' revealed the legendary manager's accounts of arguments with the likes of Keane, David Beckham and Ruud van Nistelrooy.
Ferguson slams his former captain for his 'disgraceful' interview where Keane lambasted the likes of Darren Fletcher, Alan Smith and Edwin Van der Sar on MUTV for their performance against Middlesbrough in November 2005.
Keane was allowed to move to Celtic shortly after the interview and his relationship with Ferguson has been damaged ever since.
The Irishman, who is now a pundit for ITV, said on Ferguson's claims: "In my opinion he doesn’t know the meaning of the word."
Keane also questioned Ferguson's desire to speak out on players that had brought Manchester United so much success during his 26-year reign at Old Trafford.
Ferguson and Keane won seven Premier League titles, four FA Cups and a Champions League during the midfielder's 12-year spell at the club.
You can hear what Keane had to say on Ferguson's new book in the video - brought to our attention by 101greatgoals.com - above.