Their personalities have rubbed against each other for a while now. It played out behind the dressing-room door, away from the cameras.
Outlook
Repeated incidents may damage dressing-room status.
Stung by a half-time roasting
Minor
Cause
The team were behind, and the manager needed a response. His professionalism usually steers him back from these moments.
Outlook
Manager intervention may be required if it persists.
Asked the manager for a private conversation
Moderate
Cause
His relationship with the manager has soured. His relationship with the manager is steady but tense. He has already raised this with the manager recently.