Steve Bruce says that Alan Hutton will face a few weeks on the sidelines with a hamstring injury picked up in the 4-2 win at Sheffield Wednesday at the weekend.
The right-back, who has been deployed at left-back for the majority of the season, has started each of our last 11 Championship games.
But the manager admits he's now a doubt for both QPR next Saturday and the trip to Sunderland the following Tuesday.
Bruce said: "We went to Sheffield Wednesday with four or five missing already, so to lose Alan was a blow.
"We're fortunate that when he goes down we've got someone like Neil Taylor to come on. That's not a bad replacement, is it?
"We don't want anymore injuries, though. It's a hamstring problem and it'll be a while for him.
"We'll be without him for a few weeks now. It's a shame because he's been fantastic."
Bruce is, however, hopeful that Jack Grealish and Albert Adomah can play a part against QPR on Saturday, having been without them since the derby win against Birmingham City.