Jamie Walker could make the bench for Hearts after recovering from a fractured leg.

Glenn Whelan, Aidy White and Loic Damour could also feature in the squad following injury but Steven Naismith is just behind them in his recovery.

Jake Mulraney (ankle), Peter Haring (groin), Craig Halkett (knee), John Souttar (ankle), Ben Garuccio (knee) and  Conor Washington (hamstring) remain on the sidelines.

Provisional St Johnstone squad: Clark, Duffy, Ralston, Tanser, Vihmann, Kerr, Callachan, Davidson, Holt, Swanson, Craig, McCann, Wright, O'Halloran, Kane, May, Hendry, Kennedy, Wotherspoon, Booth, Parish.

Provisional Hearts squad: Pereira, Smith, Hickey, Berra, Brandon, Dikamona, Irving, Bozanic, Whelan, Clare, MacLean, Ikpeazu, Keena, Meshino, Morrison, Henderson, Wighton, Walker, Damour, White, Doyle.