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.
His club is fighting to avoid relegation
Serious
Cause
The points gap to safety, with matches running out, is the issue.
Asked the manager for a private conversation
Minor
Cause
He has concerns about his role and standing in the squad. His relationship with the manager is steady but tense. He has already raised this with the manager recently.