Middlesbrough boss Neil Warnock has been charged with improper conduct by the Football Association following comments he made about the referee after the defeat by Swansea City.
Boro were already charged with failing to ensure their players "conducted themselves in an orderly fashion".
Warnock has until Monday, 22 March to respond to his charge.
"It is alleged that comments made by the manager during a post-match interview constitute improper conduct as they questioned the integrity of the match official and/or implied bias and/or were personally offensive and/or bring the game into disrepute contrary to FA Rule E3.