The last time Roy Keane released an autobiography, it was his description of his X-rated tackle on former Manchester City player Alf-Inge Haaland in 2001 which elicited plenty of controversy.

As his new book hits the shelves, Keane has reiterated that he has no regrets about the tackle on the Norwegian, saying: "there are things I regret in my life and he's not one of them."

In response to a question about the book on Twitter, Haaland made a dig at the Ireland assistant manager...

Well, @alfiehaaland has weighed on the Roy Keane book. pic.twitter.com/RhJzZXc5V8

— Off The Ball (@offtheball) October 6, 2014