He then blasted England and United star Luke Shaw for his defending following the shock 3-1 defeat at Watford on Sunday.
Mourinho even tore into the club’s press officer at Vicarage Road and his behaviour is once again coming under the spotlight.
The Portuguese had a monumental meltdown at Chelsea last season before getting sacked in December.
There are fears he risks losing the United dressing room in the same way if he continues to single out players for criticism.
Mourinho held a meeting with United legend Sir Bobby Charlton in the summer, when he was advised by the World Cup winner how to act in public and what the club stands for.