The Red Devils need a boost after their latest setback against Fenerbahce, but a number of absentees could force Jose Mourinho's hand.
While Jose Mourinho needs a victory against Swansea on Sunday like never before as Manchester United manager, the Portuguese heads to south Wales with fewer options than at any other time.
He might not have truly nailed down his favoured starting XI since arriving at Old Trafford, but there can be little doubt that in Chris Smalling, Eric Bailly, Ander Herrera and Paul Pogba he is heading into the clash with Bob Bradley's side without four sure-fire starters.