Colin Kazim-Richards will miss the match after suffering an ankle injury during Saturday's goalless draw against Leeds and the forward is awaiting the results of a scan amid fears he could be sidelined for two to three months.
Midfielder Lee Williamson (ankle) and defender Martin Olsson (eye) also recently started lengthy spells on the sidelines, while Dickson Etuhu is expected to miss the rest of the season due to medial knee ligament damage.
Another serious knee-injury victim, Leon Best, continued his rehabilitation with a goal for Rovers' reserves on Monday afternoon and, although Tuesday's trip to the King Power Stadium comes too soon for the Republic of Ireland international, he may be considered when Peterborough visit Ewood Park on Saturday.
Fabio Nunes (hamstring) is in the same boat as Best, while fellow winger Josh King (hamstring), midfielder David Dunn (calf) and goalkeeper Paul Robinson (back) all remain sidelined.
Blackburn last week