Manchester United manager Sir Alex Ferguson and his assistant Carlos Queiroz have been found not guilty of improper conduct.
The pair had been charged following their criticism of referee Martin Atkinson and Professional Game Match Officials (PGMO) general manager Keith Hackett after the 1-0 defeat to Portsmouth in the FA Cup.
United had a claim for a penalty turned down, before Atkinson awarded Pompey a spot-kick and sent off goalkeeper Tomasz Kuszczak after he had brought down Milan Baros.
Ferguson was furious after the game, saying: "Managers get sacked because of things like that and he's going to referee a game next week.
"He [Hackett] is not doing his job properly and he needs to be assessed.
"I'm assessed as a manager, players are assessed, referees should be assessed properly by the right people. That performance should not be accepted by our game."
Queiroz was also unhappy with Atkinson's officiating but the pair have now been cleared by the Football Association.
The pair had been charged following their criticism of referee Martin Atkinson and Professional Game Match Officials (PGMO) general manager Keith Hackett after the 1-0 defeat to Portsmouth in the FA Cup.
United had a claim for a penalty turned down, before Atkinson awarded Pompey a spot-kick and sent off goalkeeper Tomasz Kuszczak after he had brought down Milan Baros.
Ferguson was furious after the game, saying: "Managers get sacked because of things like that and he's going to referee a game next week.
"He [Hackett] is not doing his job properly and he needs to be assessed.
"I'm assessed as a manager, players are assessed, referees should be assessed properly by the right people. That performance should not be accepted by our game."
Queiroz was also unhappy with Atkinson's officiating but the pair have now been cleared by the Football Association.