Sharp, who has fired 15 goals since arriving at the Keepmoat Stadium in September, was not allowed to play against his parent club Sheffield United on Saturday and James Hayter stepped in.
Rovers squandered several chances in their 1-1 draw with the Blades, so Sharp is likely to go straight back in with Hayter making way.
Defender Gareth Roberts is doubtful due to a hamstring strain and should he miss out, Sam Hird would return to central defence with James Chambers switching to left-back and James O'Connor swapping flanks to the right-back slot.
Doncaster, unbeaten in their last six league matches, could close to within three points of the play-offs with victory.