ALEX FERGUSON faces 'trial by TV' after the FA demanded to see film footage of his Stamford Bridge rant against referee Martin Atkinson.
And the refs' union also demanded the Manchester United boss apologise publicly or come clean on why he thinks Atkinson is incompetent.
FA chiefs have until 4pm on Friday to decide whether to hit Fergie with an improper conduct charge for questioning Atkinson's 'strength and fairness' after United controversially lost 2-1 at Chelsea on Tuesday night.
Ferguson already has a suspended two-match touchline ban hanging over him from blasting ref Alan Wiley in October 2009 and labelling him 'unfit'.
Alan Leighton, national secretary of refs' body Prospect, blasted: "Alex Ferguson should come out and clarify exactly what he meant with his comments.
"I dread to think any manager seriously believes in the cold light of day that any referee is unfair or biased.
"That is an attack on the very fabric of the game.
"He should explain what he means or else it would be very helpful if he were to apologise for any implication that Martin Atkinson is unfair or biased."