Footballer of the Year Ronaldo was dismissed at Fratton Park for aiming a head-butt at Pompey substitute Richard Hughes six minutes from time after he was pushed him in the chest during a goalmouth melee following a corner.
Ferguson believes Ronaldo fell for Portsmouth´s "intimidation tactics" and castigated the Portuguese international, saying he had only himself to blame for incurring a three-match ban - including Sunday´s Manchester derby at City.
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