The Magpies face Erik ten Hag's men in the fourth round of the same competition, with Eddie Howe's charges having already seen off the Red Devils' local rivals Manchester City in round three thanks to Alexander Isak's winner.
Howe's side - who drew 2-2 at Wolves in the Premier League on Saturday - were busy preparing for the clash on Monday, with a combination of gym work and graft out on the grass on the agenda at the start of another hectic week, which sees United host Arsenal at St. James' Park three days on from Wednesday's match.
Serena Taylor was at the Magpies' Benton training centre to bring nufc.co.uk this training gallery.