Aberdeen defenders ruled out of Premiership opener against Hearts
Both players have been struggling with hamstring injuries.
Devlin hasn't played since the first leg of the Europa League tie against RoPS on the 11th July, while Ash Taylor was forced off away to Chikhura Sachkhere in the following round.
Hearts striker Steven Naismith, meanwhile, may be fit for a place on the bench. Fellow forward Conor Washington may also return after a back injury.
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Hide AdProvisional Aberdeen squad: Lewis, Logan, Leigh, Considine, McKenna, Ojo, Gallagher, McGinn, Hedges, Ferguson, Bryson, Wright, Campbell, Cosgrove, Main, McLennan. May, Wilson, Anderson, Cerny.
Provisional Hearts squad: Zlamal, Doyle, Smith, White, Souttar, Berra, Brandon, Halkett, Dikamona, Burns, Hickey, Bozanic, Clare, Walker, Cochrane, McDonald, Moore, Morrison, Naismith, Washington, MacLean, Ikpeazu, Keena.