Manchester United manager Alex Ferguson testified on behalf of Carlos Queiroz at a Portuguese Football Federation hearing on Tuesday into alleged misconduct by the Portugal coach which could cost him his job.
Queiroz is fighting charges he was aggressive and insulting toward an anti-doping team sent to test the Portugal squad ahead of the World Cup.
Queiroz has denied disrupting the tests but could be suspended and consequently fired if he is found guilty.
Ferguson was among the witnesses called by Queiroz to provide character references at the disciplinary hearing in Lisbon. He was Ferguson's assistant at Old Trafford for five years.