Manchester United defensive duo Chris Smalling and Luke Shaw deemed themselves not fit enough for Sunday's win at Swansea City.
Manchester United manager Jose Mourinho questioned the fight of some of his players, despite the club's victory at Swansea City.
United eased past Swansea 3-1 on Sunday to end a four-match winless streak in the Premier League.
Mourinho was forced to use a make-shift defence for the trip to Liberty Stadium, with duo Chris Smalling and Luke Shaw late withdrawals, while Daley Blind was only fit enough for the bench.
Ashley Young, Phil Jones, Marcos Rojo and Matteo Darmian completed the back four, and Mourinho had some words for players who deemed themselves unfit on the weekend.