The Dutchman built a reputation in Ajax for a meticulous style of management and is already looking to stamp down his authority at Old Trafford.
The Mirror says Ten Hag has demanded to know everything about his players both on and off the pitch.
Aside from conversing with a handful of players via Zoom and WhatsApp, the new boss has yet to meet the squad in its entirety but will know plenty about their professional and personal lives before pre-season.
Ten Hag is reported to be seeking information about each player’s home and family life, alongside a comprehensive run-down of their character.
The requested information also includes where each player is going on holiday, a strategy Ten Hag is seemingly deploying to ensure his squad returns to pre-season is the best shape possible.