Gillingham defender Callum Davies looks set to miss the rest of the season with an ankle injury he picked up on loan with Dover.
Paul Dickov said Doncaster needed to keep believing after a 2-1 home defeat to Gillingham in a game they had dominated.
Two goals from powerful striker Luke Norris secured Gillingham a 2-1 success at Doncaster and their first league win on the road.
Gillingham have completed the signing of free agent Danny Galbraith until the end of the season.
Team news for Saturday's League One clash between Doncaster Rovers and Gillingham at Keepmoat Stadium.
Gillingham have been drawn at home in the first leg of their Johnstone's Paint Trophy Southern Area Final against Bristol City.
Peter Taylor insists the JPT is a priority at Gillingham after they beat Leyton Orient to book a place in the Southern section final.
John Egan netted a late winner as Gillingham booked their place in the JPT Southern section final with a 1-0 win over Leyton Orient.