The disagreement started because they judged training effort very differently. It played out on the training ground in front of the rest of the squad.
Outlook
Likely to settle unless repeated within the next few weeks.
Struggled with training intensity
Minor
Cause
His condition and recent minutes made the session harder than usual, so staff treated it as fatigue rather than attitude.
Asked the manager for a private conversation
Minor
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.