Birmingham will be wanting to put their midweek defeat to Norwich City behind them and improve their chances of survival.
The Blues could be without Spanish winger Ivan Sánchez, who is suffering with a groin problem.
QPR have three players currently ruled out for the Birmingham fixture. Jordy de Wijs (discomfort), Charlie Owens (knee) and Luke Amos (ACL) will be unavailable for Mark Warburton.
Etheridge, Colin, Dean, Friend, Pedersen, Leko, Harper, Gardner, Šunjić, Bela, Hogan.
Diang, Wallace, Barbet, Cameron, Dickie, Kane, Johansen, Ball, Chair, Austin, Dykes.
The hosts come into this fixture having won one game in eight. They picked up a vital win against Sheffield Wednesday last weekend but then they slipped to a defeat against a clinical Norwich side midweek.
QPR come into the match in a good run of form. The Hoops have won four out of their last five matches and they have two games in hand on most of the sides above them. They are currently nine points outside the play-offs and their form suggests they could stake a claim on a place this campaign.
Ones to watch
A real bright spark for the Blues in recent weeks, ignoring their form. He was the match winner against Sheffield Wednesday after a brilliant all-round performance. His strike brought his goal tally for the season to six. The forward is currently in the best form he has been in all season. Although he missed a golden opportunity against Norwich midweek, the forward's confidence will still be high.
The veteran forward has proved he is still a match-winner in the SkyBet Championship. Since he rejoined the Hoops on loan from West Bromwich Albion, Austin has netted on three occasions, all of the matches victories. They show how important his goals have been to his side and how his all-round contributions have bolstered Mark Warburton's side.
How to watch
This fixture is available through BluesTV for the hosts and QPR+ for the visitors. Match passes are priced at £10.
Kick-off is at 3pm.