Northern Ireland international Ethan Galbraith, who has played in 26 matches for Rovers this season but has been missing since the turn of the year, is struggling with an issue in his leg and is receiving treatment with the Premier League giants.
“Ethan’s still at Manchester United, ” said Doncaster boss Gary McSheffrey.
“It’s taking a little bit longer to clear up than we’d like but it’s one of those things. It needs a bit more time.
“He’s had a bit of a sciatica problem. It’s a bit of a nerve problem that’s been causing some pain in his hamstring and calf.
"So it’s just trying to settle that and then load it as well so we can nip it in the bud.
"But it’s out of my hands so when he comes back I’ll be delighted but until then I’ll just focus on the lads that are fit and can make an impact.”
“Charlie’s just got a pain just above his knee,” said McSheffrey. “He got it in the warm-up at Portsmouth having a shot.
"He tried training on Monday but just hobbled off. He did a little bit today but I’m not sure what the extent of it is and he’s not right yet.”