Man United mutiny: Now Amad Diallo's 'f***ing disgrace' post follows Lisandro Martinez's rant, as Wayne Rooney fears dressing room could be 'ripped apart'

Manchester United are facing a dressing room crisis after two players publicly vented their frustration following a defeat. Winger Amad Diallo posted a 'f***ing disgrace' message on Snapchat, compounding an earlier rant from defender Lisandro Martinez directed at the club's hierarchy. Former United captain Wayne Rooney has warned that the public outbursts risk tearing the dressing room apart.