Manchester United midfielder Antonio Valencia is set to be ruled out of the West Bromwich Albion game with a hamstring injury.
Valencia becomes the ninth Manchester United player ruled out, after the Ecuadorian international had only just returned to the starting lineup.
He will miss the trip to the Hawthorns after picking up an injury against Everton in United's last Premier League match before the international break.
United won the match 2-1 at Old Trafford, but Valencia picked up a hamstring tweak in the second half and was replaced by Belgian international Marouane Fellaini with 11 minutes to play.
The Daily Mail reports that it should keep him out of the match against WBA, adding to the club's lengthy injury list. Youngster Paddy McNair had performed well in an emergency role but he is now out as well, also with a hamstring problem, while Phil Jones and Chris Smalling remain sidelined.
Other injuries for United include Jonny Evans, Ashley Young, Ander Herrera and Jesse Lingard
Michael Carrick could return to the squad on Monday night having missed the entire season so far, and the injury hit start to the campaign has seen van Gaal use 30 players already this term.
Other injuries for United include Jonny Evans, Ashley Young, Ander Herrera and Jesse Lingard, which means van Gaal will have a depleted squad to choose from for the Monday evening fixture.
Matt Radcliffe will be tasked with improving the injury situation at Old Trafford, and it looks like he's got a big job on his hands.
Like Arsenal, who hired Germany physio Shad Forsythe in an attempt to improve their injury troubles, Manchester United have appointed Matt Radcliffe. The physio will be tasked with improving the injury situation at Old Trafford, and it looks like he's got a big job on his hands.
United face West Brom at the Hawthorns on Monday night, with the kick off scheduled for 8pm.