Michael Appleton's Rovers have not won in four and were defeated 3-0 by Leicester City on Tuesday evening to dent their hopes of reaching the playoffs. They are currently seven points adrift of sixth-placed Brighton and Hove Albion.
Peterborough sit bottom of the table and are four points away from safety going into the game, following defeats in their last two matches.
Blackburn striker Leon Best, who has yet to feature for the club after injuring his knee in the summer, will have a late fitness test ahead of the match. Colin Kazim-Richards is also struggling with an ankle injury.
Blackburn Rovers: WWDLDL
Peterborough United: DDWWLL
Possible starting lineups
Blackburn Rovers: Kean, Orr, Dann, Hanley, Rekik, Bentley, Lowe, Murphy, Pedersen, Campbell, Rhodes
Peterborough United: Olejnik; Zakuani, Little, Swanson, Bostwick; McCann, Rowe, Petrucci, Mendez-Laing; Tomlin, Gayle
Sports Mole says: 2-0