Harry Redknapp blamed QPR's mounting injury list for the latest setback in their bid to return to the Premier League.
Goals from Charlie Austin and Karl Henry gave Sky Bet Championship promotion-chasers QPR a fourth consecutive league victory as they beat Bolton 2-1.
Assistant boss Kevin Bond admitted QPR would be "very vulnerable" without Charlie Austin after the striker's brace secured a 2-1 win at home to Huddersfield.
A Charlie Austin double took QPR up to second in the Sky Bet Championship and secured a 2-1 victory over battling Huddersfield.
Charlie Austin's injury-time goal secured QPR's first win in four Sky Bet Championship matches.
QPR will check on Clint Hill and Charlie Austin ahead of the visit of Doncaster.
QPR look set to be without leading scorer Charlie Austin when they head to Watford.
Nottingham Forest beat QPR 2-0 to breathe life back into their Championship play-off hopes.
Charlie Austin's spectacular goal gave Sky Bet Championship promotion-chasers QPR a 1-0 victory over Charlton in the London derby at Loftus Road.
QPR boss Harry Redknapp blasted referee Michael Naylor for failing to punish Wigan goalkeeper Lee Nicholls when he collided with substitute Andrew Johnson late
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