Manchester United's manager should find out on Monday whether the authorities have charged him after he hit out at the official following Darren Fletcher's sending-off.
Furious: Ferguson launches another protest at the assistant referee
CLICK HERE FOR BIRMINGHAM v MANCHESTER UNITED MATCH REPORTThe Scotland captain was dismissed following two yellow cards, the second of which was labelled 'soft' by the United boss.
And while that in itself is insufficient to see him hauled to account, it appears that the FA are under increasing pressure to act to stop Ferguson's persistent attacks.
Dispute: Fletcher (right) argues with referee Mark Clattenburg
He said: 'I've been watching Clattenburg this season. He did the Arsenal v Tottenham game.
'You would have had to have hit someone with an axe before he would have booked anyone.'
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