Leeds midfielders Amdy Faye and Sanchez Watt and defender George McCartney are all doubtful for the home game with Leicester.
Faye and Watt are struggling with ankle knocks and could face late fitness tests, while on-loan Sunderland left-back McCartney lasted just over half an hour of Saturday's win at Middlesbrough before succumbing to illness.
Andrew Hughes is likely to continue in place of McCartney if he fails to make it, but Leigh Bromby provides another option, while Max Gradel and Neil Kilkenny, both unused substitutes at the weekend, could step into midfield.
Manager Simon Grayson said: "Both Amdy and Sanchez took knocks on the ankle and neither trained on Monday. There were a few tackles flying in and they're both doubts.
"George is sick and hasn't trained either, and we've got one or two other knocks from the weekend, so we'll see where we are on Tuesday morning. It might be that one or two other players get an opportunity."