Leeds midfielders Amdy Faye and Sanchez Watt and defender George McCartney are all doubtful.
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."
Sven-Goran Eriksson has no new problems as he prepares for his first away game as Leicester boss.
The Swede's reign began with a 1-1 home draw against Hull on Saturday, when he was unable to call on Dany N'Guessan. The forward suffered ankle ligament damage on the recent trip to Thailand and has yet to regain fitness.
Kyle Naughton and Curtis Davies made their debuts against Hull and the defenders are likely to keep their places in the side.
Eriksson has options should he wish to make changes. Yuki Abe and Franck Moussa, second-half substitutes at the weekend, will hope to have done enough to force their way into the starting line up, while Julio Moreno, Robbie Neilson and Michael Morrison are also pushing for recalls.