Queen of the South (4-2-3-1): Trialist; Chris McQueen, Niall Rogerson, Caleb Goldie, Zander MacKenzie; Taylor Charters, Ben Johnstone; Jack Stott, Liam Smith, Billy Gray; Nicky Clark.
Head coach Murphy could freshen up his selection after Saturday’s away win at Brora Rangers. Billy Gray and Ben Johnstone are likely candidates to earn recalls to the first XI.
Aberdeen: (4-2-3-1) Marius Muller; Lewis Mayo, Jack Milne, Dan Happe, Nesta Guinness-Walker; Brad Lyons, Afeez Aremu; Tony Yogane, Connor Ronan, Toyosi Olusanya; Kevin Nisbet.
Head coach Robinson has no new injury issues this week. Toyosi Olusanya is pushing for a recall after a 30-minute substitute appearance against Queen’s Park.
Kusini Yengi remains sidelined with a long-term thigh issue.
"We shouldn't be relying on Marius to make a triple save," manager Robinson told BBC Radio Scotland's Sportsound.
"It was a fantastic save, and that's why we signed him, so, on a positive, we've signed a very good goalkeeper.
"We should be out of sight in the game. We start really well with energy, and then the game becomes too easy, and we start taking liberties and slowing the game down, not doing simple things better than the others."