Manager Steve Cotterill says Birmingham City's squad is in a "critical situation" because of injuries in some areas of the team.
The Blues are currently in the Championship relegation zone, in 22nd place with 16 points from 20 matches.
Asked if the solution to the club's problems lay within the first-team squad, the 53-year-old replied: "Some areas, only in some areas.
"We are unbalanced is probably the best way of putting it."
Birmingham, who travel to Fulham to Fulham on Saturday, have won only four times in the Championship this season.
"The trouble is that when you get an injury in those unbalanced areas, it then becomes you are in a critical situation," added Cotterill.
"This is where I think we are at this moment in time, in that critical situation."