Martin could be given the nod to start but manager Nigel Clough is hopeful Bywater could be included in the squad. If Bywater is not fit, academy keeper James Severn could be on the bench.
"We are hoping Stephen will be fit enough at least to go on the bench," said Clough. "We have been managing his back problem. He hasn't trained much in the last week or two, he has just been playing the games and we are hoping he will be able to do that for the rest of the season."
Chris Porter missed the game at the Madejski Stadium with a virus and the striker will continue to be monitored.