Fitness and form guide for weekend's Premiership matches
Five matches will be played on Saturday, while Hearts host Kilmarnock on Sunday.
Brendan Rodgers' Celtic have the chance to break a 100-year-old record when they visit Perth in Saturday's early kick-off.
The afternoon's fixtures see Hamilton host Aberdeen, Dundee travel to Hibernian, Rangers take on Motherwell and Ross County face Motherwell.
Sunday's lone Premiership contest sees Kilmarnock visit Murrayfield to take on Hearts.
St Johnstone v Celtic, Saturday, 12.30pm
Injuries: Brian Easton (knee), Chris Millar (groin), Murray Davidson, Stefan Scougall (Achilles) and Michael O"Halloran (ankle, doubtful).
Injuries: Patrick Roberts (hamstring), Anthony Ralston (knee), Jozo Simunovic (hamstring), Erik Sviatchenko (knee).
Last season: Celtic 4-1 St Johnstone, St Johnstone 2-5 Celtic, Celtic 1-0 St Johnstone, St Johnstone 2-4 Celtic.
Last five league matches: St Johnstone LLLDL; Celtic WDWWD.
Top scorers (all competitions): Michael O'Halloran (St Johnstone) five; Scott Sinclair (Celtic) 11.
Referee: Bobby Madden.
Venue: McDiarmid Park
Hamilton Academical v Aberdeen, Saturday, 3pm
Injuries: Ali Crawford, Georgios Sarris (both knee).
Suspensions: Massimo Donati.
Aberdeen have a full squad available.
Last season: Hamilton 1-0 Aberdeen, Aberdeen 2-1 Hamilton, Hamilton 1-0 Aberdeen.
Last five league matches: Hamilton LLLDW; Aberdeen WWWLW.
Top scorers (all competitions): Rakish Bingham (Hamilton) four; Ryan Christie and Adam Rooney (Aberdeen) four.
Referee: Nick Walsh.
Venue: SuperSeal Stadium.
Hibernian v Dundee, Saturday, 3pm
Injuries: Danny Swanson (knee).
Injuries: Darren O'Dea (concussion).
Last season: No corresponding fixture.
Last five league matches: Hibernian DLWWW; Dundee WLLLL.
Top scorers (all competitions): Simon Murray (Hibernian) 12; Sofien Moussa (Dundee) six.
Referee: John Beaton.
Venue: Easter Road.
Rangers v Partick Thistle, Saturday, 3pm
Injuries: Lee Wallace (groin), Fabio Cardoso (broken nose), Graham Dorrans (ankle), Jordan Rossiter (knee).
Injuries: Chris Erskine (calf), Stuart Bannigan, Callum Booth, Mustapha Dumbuya (all knee), Christie Elliott (ankle), Abdul Osman (shoulder).
Last season: Partick Thistle 1-2 Rangers, Rangers 2-0 Partick Thistle, Partick Thistke 1-2 Rangers, Rangers 2-0 Partick Thistle.
Last five league matches: Rangers LWWDW; Partick Thistle LLWDW.
Top scorers (all competitions): Alfredo Morelos (Rangers) eight; Blair Spittal (Partick) six.
Referee: Willie Collum.
Ross County v Motherwell, Saturday, 3pm
Injuries: Scott Fox (thigh).
Injuries: Steven Hammell (doubtful), Ellis Plummer (hamstring).
Last season: Motherwell 0-1 Ross County, Ross County 1-2 Motherwell, Motherwell 4-1 Ross County, Ross County 1-1 Motherwell.
Last five league matches: Ross County WLWDL; Motherwell LWWWL.
Top scorers (all competition): Craig Curran (Ross County) six; Louis Moult (Motherwell) 11.
Referee: Euan Anderson.
Venue: Global Energy Stadium.
Hearts v Kilmarnock, Sunday, 3pm
Injuries: Jamie Walker (hamstring), Aaron Hughes (calf), Ashley Smith-Brown (pelvis), Arnaud Djoum, Malaury Martin, Connor Randall, Prince Buaben.
Injuries: Iain Wilson (knee), Gary Dicker (stomach), Greg Kiltie (ankle) and Steven Smith (back), Rory McKenzie, Chris Burke and Dom Thomas (doubtful).
Last season: Kilmarnock 0-0 Hearts 0, Hearts 4-0 Kilmarnock, Kilmarnock 2-0 Hearts.
Last five league matches: Hearts LWWLL; Kilmarnock LWDDL.
Top scorers (all competitions): Kyle Lafferty (Hearts) nine; Kris Boyd (Kilmarnock) five.
Referee: Kevin Clancy.