The Royals moved into the play-off places on Saturday with a home win over Portsmouth and McDermott could name the same XI.
Full-back Andy Griffin was on the bench on Saturday after six games out with an Achilles injury but midfielder Brynjar Gunnarsson could continue to deputise.
Winger Jobi McAnuff returned from a hamstring injury and is fit while Australian goalkeeper Adam Federici is still missing as he recovers from a knee problem.
Striker Noel Hunt (foot) is out along with on-loan QPR midfielder Mikele Leigertwood (calf) and defender Matt Mills (groin).
Shane Long will continue as the lone striker after he reached the milestone of 50 goals for the club with a brace on Saturday.
Source: PA
Source: PA