On-loan midfielder Fabian Delph has been ruled out of Leeds United's weekend Championship clash at home to Doncaster with an ankle injury.
The 22-year-old, who is back at Elland Road on a month's loan from Aston Villa, has had to return to his parent club for further treatment after picking up the knock during the midweek defeat at Coventry.
Delph has suffered from a history of ankle problems which has limited his number of first-team opportunities since signing for Villa in 2009.
Caretaker United boss Neil Redfearn confirmed on the club's official website: "Fab will be out for Saturday. He's gone back to Villa to be assessed, but he is being monitored and we're hoping it will be a case of days.
"Fab's a good player. Against Bristol City and Brighton I thought he played well. He's a big influence and he'll be a big loss."
Delph's initial loan period is due to expire after the trip to Portsmouth in a fortnight.