Rangers midfielder Ryan Jack is a doubt for the visit of Livingston after aggravating a knee problem while on Scotland duty.
Winger Ryan Kent is in contention to feature after signing from Liverpool but he is still catching up with his match-sharpness.
Livi full-back Ricki Lamie is hoping to return from a knock.
Provisional Rangers squad: McGregor, Tavernier, Flanagan, Helander, Halliday, Barisic, Edmundson, Goldson, Katic, Jack, Davis, Aribo, Kamara, Docherty, King, Arfield, Ojo, Barker, Defoe, Morelos, Kent, Foderingham.
Provisional Livingston squad: Stewart, Devlin, Lamie, Lithgow, Guthrie, McMillan, Savane, Bartley, Lawless, Crawford, Sibbald, Erskine, Stobbs, Souda, Tiffoney, Dykes, Pepe, Henderson, Sarkic.