The Scotland winger suffered bone bruising during Thursday's Europa League win in Riga and could be missing for at least a couple of weeks.
Skipper Scott Brown should be fit and available despite being the target of a shocking rake of the studs down his Achilles in Latvia, but defender Christopher Jullien (back) is a doubt once more while Mikey Johnston is definitely out after calf surgery.
Hibernian are still without former Celtic midfielder Scott Allan as the club explore a health issue affecting the player.
Loan player Jamie Murphy returns after having to sit out the 2-2 draw with parent club Rangers.
Sean Mackie is continuing his rehab while midfielder Fraser Murray has signed for Dunfermline on a season-long loan.