Chisholm: Set to stick with the side that beat Aberdeen
Queens manager Gordon Chisholm is likely to select the same team and substitutes he picked for the win over Aberdeen at Hampden.
Stephen Dobbie will partner Sean O'Connor in attack, in a 4-4-2 formation. Paul Burns adds youth to an experienced midfield while Thomson and Andy Aitken have formed a solid rearguard action in the centre of defence.
Scotland Under-21 goalkeeper Jamie MacDonald, on loan from Hearts, will play his final game for Queens before returning to Tynecastle.
Queen of the South: MacDonald, McCann, Thomson, Aitken, Harris, Burns, MacFarlane, Tosh, McQuilken, Dobbie, O'Connor, Stewart, Grindlay, O'Neill, Paton, Gilmour, Robertson, Lauchlan.