From left to right, Garner, Greenwood, Williams and Chong have all travelled with United for the game against PSG

They stood at the side of the pitch chatting, their fresh faces scanning the arena within which they could become household names tonight.

Had they not been wearing their official Manchester United training gear, one could have been forgiven for thinking that they were on a school trip.

In fact, Mason Greenwood, the 17-year-old United striker, is due back in class at Ashton on Mersey School on Friday. United have a partnership with the school, which allows their youngsters to carry on their studies as they train with the club’s academy.

Tonight, however, Greenwood will be part of a United squad given the task of completing what Le Parisien described as “mission impossible” a few days ago. United’s injury crisis means that five academy players