Coke was recalled to the starting line-up by caretaker-boss Stuart Gray, who guided the Owls to only their second win of the season in midweek against Leicester, but picked up a strain.
Jose Semedo and Stephen McPhail are on stand-by if Coke fails to make it, while defender Lewis Buxton is also in a race to prove his fitness after missing out on Tuesday night with a similar problem.
Glenn Loovens made his debut in midweek after signing a short-term deal and is expected to continue, while recalled trio Jacques Maghoma, Kieran Lee and Atdhe Nuhiu are also hoping to retain their places.
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- Lewis Buxton
- Stephen McPhail