Manchester United teen Mason Greenwood has been warned for disciplinary reasons after the 19-year-old reported late to team activities on numerous occasions, according to a report from The Guardian's Jamie Jackson.

The news of Greenwood's alleged indiscretions comes days after United manager Ole Gunnar Solskjaer strongly denied speculation suggesting the 19-year-old was dropped from the squad for a violation of team rules.

Greenwood didn't feature in Saturday's win over Newcastle United, nor did he travel with the team for the dramatic Champions League victory over Paris Saint-Germain on Tuesday night in the French capital.