Club captain Chris Porter has been stepping up his rehabilitation from a knee injury, but full-back Richard Brindley (knee) is still sidelined. Goalkeeper Reice Charles-Cook should be fit for Coventry after a hamstring complaint. The 21-year-old signed a new two-and-a-half-year deal on Thursday keeping him at the Sky Blues until June 2018. Adam Armstrong and Ryan Kent are available after missing the FA Cup defeat against Northampton under the terms of their loans while Joe Cole could also return. Reda Johnson (hamstring), James Maddison (ankle) and Jordan Willis (knee) are all out long-term with skipper Johnson not expected back this season.