Although manager Ole Gunnar Solskjaer is expected to give an update on the injury situation during his pre-match press conference, which will be covered live on the Official App, MUTV and ManUtd.com from 13:30 BST, obviously some clues have been garnered from the open session.
Nonetheless, it is worth pointing out that those spotted do not necessarily form the squad for the tie and any absentees are not definitely ruled out of the Old Trafford occasion.
David De Gea and Nemanja Matic, who are one game away from a 50th personal appearance in the competition (from the group stage onwards), were among those taking part in the session.