John Giles believes referees are like "mice" during on-field confrontations with Jose Mourinho.
The Chelsea manager was involved in heated discussions with officials during the tempestuous Capital One Cup match against Liverpool and John is not happy with the way the referee dealt with it.
Speaking to Off The Ball as always on a Thursday and pinpointing how former Manchester United manager Alex Ferguson started the trend, he said: "They're like mice around him. At half time - and it was on camera - [you could see him] really abusing and questioning the referee which he's not supposed to do and the referee was standing there, not saying a dickie bird to him. The fourth official was telling Mourinho, 'there's a camera on you, you'd better clear off out of the way,' instead of getting onto him, calling him over up into the stand and reporting him to the officials. He's bullying the referee at half-time about the penalty incident."
John also turned his attention to Diego Costa, who has been charged with stamping on a Liverpool player and he described the striker's actions as "stupid" and that he does not think it was an accident.
The Leeds and Ireland legend also looked ahead to Chelsea's top-of-the-table clash against Manchester City and is backing the London side to win even with Costa and Cesc Fabregas out.
In fact, he thinks that Mourinho will go for the win rather than the perception that he will set up the team to avoid defeat.
Meanwhile, Manchester United were unable to beat Cambridge United in the FA Cup fourth round and John believes Louis van Gaal has "handled the PR side of it very well" in comparison to predecessor David Moyes.