Kilmarnock manager Derek McInnes is once again forced into changes after a red card, with Liam Donnelly suspended. Fellow midfielder David Watson and Danny Armstrong drop to the bench.

Gary Mackay-Steven replaces the latter on the wing in his first league start of the season, while there are rare starts for Fraser Murray and striker Bruce Anderson - changes Kilmarnock fans had been calling for.

Visiting boss Tony Docherty changes his goalkeeper again, with Jon McCracken back between the sticks and Trevor Carson missing out completely.

Clark Robertson also drops out, in the only other change, with Ryan Astley comes into defence.

New signing Sean Kelly, the former Livingston defender most recently with Karmiotissa in Cyprus, comes straight on to the bench.

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Jim Goodwin makes one change to the United side that started their 1-1 draw with Rangers, as on-loan Norwich City defender Emmanuel Adegboyega replaces winger Kai Fotheringham.

Centre-half Ross Graham is back in action but only fit enough to make the bench.

St Mirren manager Stephen Robinson, perhaps not surprisingly, names the same side that started their 2-1 win over Aberdeen.

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Dundee United: Walton, Strain, Holt, Sevelj, Babunski, Ferry, Middleton, Adegboyega, Stephenson, Dalby, Gallagher.

Substitutes: Richards, Graham, Moult, Odada, Fotheringham, Van Der Sande, Thomson, Stirton, Meshack.

St Mirren: Balcombe, Bwomono, Fraser, Gogic, Taylor, Tanser, Phillips, O'Hara, McMenamin, Kiltie, Olusanya.

Substitutes: Urminsky, Kenny, John, Smyth, Boyd-Munce, Idowu, Mooney, Ayunga, Mandron.

Celtic: Schmeichel, Johnston, Carter-Vickers, Scales, Valle, McGregor, McCowan, Bernardo, Forrest, Maeda, Idah.

Substitutes: Sinisalo, Taylor, Trusty, Kyogo, Kuhn, Yang, Engels, Hatate, Ralston.

Ross County: Laidlaw, Brown, Leak, Wright, Campbell, Harmon, Telfer, Nisbet, Chilvers, Hale, White.

Substitutes: Hamilton, Allardice, Loturi, Sheaf, Grieves, Efete, Samuel, Brophy, Reid.

Kilmarnock: McCrorie, Mayo, Wright, Deas, Ndaba, Mackay-Steven, Lyons, Murray, Anderson, Vassell, Watkins.

Substitutes: O'Hara, Burroughs, McKenzie, Armstrong, Watson, Cameron, Wales, Polworth, Bainbridge.

Dundee: McCracken, Portales, Astley, Koumetio, McGhee, Mulligan, Sylla, Cameron, Robertson, Palmer-Houlden, Murray.

Substitutes: Sharp, Ingram, Tiffoney, Adewumi, Kelly, Braybrooke, Vetro.

Motherwell: Oxborough, Kaleta, Casey, Gordon, Balmer, Wilson, Zdravkovski, Halliday, Miller, Maswanhise, Stamatelopoulos.

Substitutes: Hegyi, Seddon, Robinson, Paton, Blaney, Koutroumbis, Ebiye, Gillies, Watt.

Hibernian: Smith, Iredale, Bushiri, O'Hora, C Cadden, N Cadden, Triantis, Newell, Youan, Kuharevich, Hoilett.

Substitutes: Bursik, Miller, Levitt, Doyle-Hayes, Boyle, Kwon Campbell, Gayle, Molotnikov.

Celtic top Saturday's Premiership bill, with Brendan Rodgers' reigning champions hosting Ross County with the chance to extend their lead to five points before Aberdeen visit Heart of Midlothian on Sunday.

Dundee United could overtake third-top Rangers, who face St Johnstone on Sunday - but only if they defeat visitors St Mirren by at least three goals.

Motherwell are a point behind United as they host a Hibernian side who can move off the bottom with at least a point.

Meanwhile, Kilmarnock and visitors Dundee will hope to narrow the gap on the top six. Let's get to the team news...

• Celtic v Ross County
• Dundee United v St Mirren
• Kilmarnock v Dundee
• Motherwell v Hibernian

All games kick-off at 15:00 GMT.

The build-up to this afternoon's games has just started on BBC Radio Scotland.

Pat Bonner, Stephen Craigan, Billy Dodds, Stephen McGinn, Willie Miller and Rory Loy are the former players joining host Kenny Macintyre on Sportsound.

Click the links at the top of the page to listen or via other technology, coverage splits from 15:00, with Celtic v Ross County commentary with Rob Maclean on BBC Radio Scotland Extra/MW and Open All Mics on BBC Sounds/FM.

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Welcome to a big weekend for Scottish football - not only a full programme of Premiership fixtures but also the arrival of Championship clubs at the third-round stage of the Scottish Cup.

Stay with us for the build-up, live updates and post-match reaction on BBC Radio Scotland and here online.

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