St Johnstone striker Dara Costelloe is suspended after being sent off against Kilmarnock. Sam McLelland, Drey Wright (knee) and Ali Crawford (calf) are battling back from their respective injuries.
Motherwell will assess Calum Butcher and Brodie Spencer after both sustained suspected broken noses against Kilmarnock on Saturday.
The Fir Park club are waiting on the scan results on Paul McGinn’s cheek injury, which possibly means a long-term absence.
Lennon Miller missed the Killie game with a knock, while Jon Obika (hamstring) and Pape Souare (ankle) are long-term absentees.