QPR expect Jack Robinson to be out of action for at least a couple more weeks.
Robinson, sidelined by a long-term knee injury for much of his time at Rangers, has made four appearances this season.
His most recent outing came during the 2-1 home defeat against Wolves on 1 December, when he picked up a hamstring injury late in the game.
He completed the match because Rangers had made all three of their substitutions.
Initial tests suggested the problem was a minor one, but Robinson is not currently fit enough to train fully.