United's midfield dynamo re-opened the spat between him and Haaland last week when comments in his autobiography stated that his horror-tackle was no accident.
Haaland's employers Manchester City are to sue Manchester United and Keane for £6 million.
Meanwhile, the FA have said that they will read the autobiography in full before decidng whether to charge the Irishman for bringing the game into disrepute.
Twenty-nine-year-old Norwegian Haaland has not played since he received the atrocious tackle.
Former Republic of Ireland international Keane this Summer missed the chance to go to World Cup because of a spat with manager Mick McCarthy.
Reading captain Phil Parkinson, who has got into referee's bad books many times in the past for bad tackles of his own, feels the FA should deal with Keane severley for damaging football's reputation.
"I remember when he made that tackle on Haaland, and thinking it was made by a player with total disregard for the consequences of his actions. Sometimes it seems that he feels he's bigger than the game itself.
"To come out and admit the maliciousness in his tackle was premeditated is an insult to our profession, and I hope the FA throw the book at him."