The Robins' expected promotion challenge this season has failed to materialise due in part to a succession of injuries and Johnson's side are currently closer to the relegation zone than the top six.
Midfielder Neil Danns remains an injury doubt for Crystal Palace.He has been struggling with a back problem which has forced him to miss the last two games, and he looks unlikely to return on Tuesday.
Stephen Henderson has been recalled from his loan spell at Aldershot Town by parent club Bristol City.The Irish keeper made eight consecutive appearances for the Shots after joining at the beginning of February.
The Robins put in a dire performance during their 5-2 home drubbing by Doncaster, which continued their slide down the table and resulted in a section of the City faithful questioning Johnson's position.
The game between Crystal Palace and Bristol City in the Championship on Tuesday, 9th March 2010 at 20:00 takes centre stage for FootyMad's preview analysis.
The 19-year-old Arsenal striker was applauded off by supporters of both teams when he was substituted seven minutes from time in Rovers' 5-2 win at Bristol City.