QPR will be looking to sign a goalkeeper on emergency loan this week after David Marshall suffered a hamstring injury in the 3-1 loss at Nottingham Forest.
Three second-half goals, two of them in the final seven minutes, saw Rangers slip into defeat after taking the lead through Andre Gray in the first half.
Rangers finished the game with 10 men and Lee Wallace in goal, after Marshall left after all three substitutions had been made.
Marshall’s injury looms as a serious problem, with goalkeepers Seny Dieng, Jordan Archer and Joe Walsh also sidelined.
EFL rules prevented Rangers from providing extra cover before Marshall’s injury.
And with Premier League clubs not allowed to loan players out, the club are in a race against time to find a goalkeeper for Sunday’s game against Peterborough.
Manager Mark Warburton says they may have to look to teams outside the Championship for emergency cover.
“David told us he’s never had a muscle injury in his career. He made a fantastic save where he dove into the corner, but unfortunately that made it worse,” Warburton said.
“We had used our subs and hoped we could deal with it and finish the game, but obviously we have a problem now.
“We had four full-backs earlier in the season, which is quite remarkable, and now we have four goalkeepers. I have never seen anything like it in my life.
“We have to look at the options and we have to act quickly because we are playing on Sunday.
“We can sign emergency goalkeepers outside the transfer window, but not from the Premier League. I don’t know if many Championship clubs will want to help us.
“Phone calls are being made now to see what is available.”
Rangers also lost Chris Willock to a hamstring injury in the first half which really hampered their attacking play as Forest struggled to deal with their threat before limping off after half a half. time.
“I thought he was in really good shape,” Warburton said.
“We wanted Andre (Gray) to stretch them out and Chris to pick up the ball deeper and hit them, which he was doing.
“He was having fun, looked dangerous, and they weren’t happy trying to deal with him.
“He got kicked in the back of the hamstring – really harmless. We certainly paid the price tonight.