Fleming blow for Dumbarton
Dumbarton are without Garry Fleming when they host Queen of the South.
Suspension rules Fleming out the clash against a Queen of the South side that are level on points with Dumbarton, who have a worse goal difference, in the race for the play-offs.
Manager Ian Murray, who has no other injury or suspension worries, said: "This would be a great game to win as a defeat takes things out of our hands as does a draw due to goal difference.
"We have done well to still be involved at this stage of the season and whatever happens - happens, but we will be looking to get the win that keeps our great season going."
Queen of the South could be without four players for their trip to the Bet Butler Stadium, with Mark Durnan ruled out due to a leg knock and Mark Kerr, Michael Paton and Bob McHugh all struggling with injuries.
Manager Jim McIntyre is playing down the importance of the game, saying: "It is an important game but whoever wins it is not guaranteed anything, so it is not an all or nothing affair.
"They have done very well this season and are the top goalscorers in this league. We are well warned that we cannot make the same defensive mistakes we have made our recent defeats to Falkirk and Raith Rovers."