Kenny Jackett expects Dion Donohue to ‘miss the best part of a month’ with a hamstring injury.
The midfielder limped out of Tuesday’s draw with Burton Albion after 28 minutes.
The game with the Brewers represented only his fourth game of the season, following glandular fever and injury.
He is now expected to miss up to ‘three to four weeks’ as Jackett prepares to take his side to Accrington this weekend.
Jackett said: ‘The estimation is three to four weeks, which is not good news for him.
'I do feel for him, but also, he needs to be tough enough to come through that.
'We've seen in the few games he's played, and last year, obviously, the quality his left foot can bring in terms of his passing range and his delivery.
'But as a group we are strong enough to come through that and that's what you put a squad together for.
‘We think he'll miss the best part of a month.’
Meanwhile, Oli Hawkins is expected to be fit for Saturday’s trip to the Crown Ground after picking up an ankle problem against Burton.