Coventry manager Mark Robins is not revealing whether loan trio David McGoldrick, Callum Ball and James Bailey have been given clearance to play in the cup tie.
McGoldrick, who has eight goals this season and six in his last six games, is unlikely to be given the green light by parent club Nottingham Forest.
The in-form striker is scheduled to return to the City Ground ahead of Forest's involvement in the competition in January, when a handful of clubs, including the Sky Blues, will be keen to see if he becomes available.
Boss Robins is also waiting for a decision from Derby as to whether striker Ball and midfielder Bailey will be able to feature.
Fellow loanees Jamie Reckord (Wolves), Conor Henderson (Arsenal) and Reece Brown (Manchester United) are understood to have each been cleared by their respective parent clubs.
Defender Nathan Cameron is expected to be okay having missed last weekend's 1-0 win at Leyton Orient with a minor twinge.