Derby have signed goalkeeper David Martin on a month's loan from Liverpool in time for Saturday's Championship trip to Doncaster.

Captain Robbie Savage played in goal for 50 minutes at Reading on Wednesday night after first-choice keeper Stephen Bywater was forced off with a back injury and his replacement Saul Deeney was sent off.

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.