St Johnstone manager Simo Valakari makes five changes to the side that lost 3-1 to Dundee last time out.

Andy Fisher, the 26-year-old Englishman signed on loan from Swansea City, makes his debut in goal with defender Aaron Essel, midfielders Fran Franczak and Max Kucheriavyi, plus striker Mackenzie Kirk, also coming into the starting XI.

Josh Rae drops to the bench along with Andre Raymond, Graham Carey and Matt Smith. Speedy striker Adama Sidibeh misses out.

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Rangers boss Philippe Clement makes two changes to the side that drew 1-1 with Dundee on Thursday.

Nico Raskin returns in midfield after suspension to captain the side and Danilo starts up front.

Connor Barron and Nedim Bajrami drop to the bench.

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Aberdeen: Doohan, Devlin, Tobers, Nilsen, McGarry, Palaversa, Shinnie, Clarkson, Okkels, Keskinen, Nisbet.

Substitutes: Ritchie, McGrath, Polvara, Duk, Morris, MacDonald, Boyd, Ambrose, Enem.

Heart of Midlothian: Gordon, Oyegoke, Halkett, McCart, Penrice, Baningime, Grant, Devlin, Drammeh, Wilson, Spittal.

Substitutes: Fulton, Rowles, Forrest, Boateng, Kabangu, Dhanda, Neilson, Forrester, Vargas.

Rangers: Kelly, Ridvan, Propper, Nsiala, Jefte, Raskin, Hagi, Diamonde, Cerny, Danilo, Igamane.

Substitutes: Munn, Cortes, Barron, Dessers, Bajrami, Matondo, Dowell, King, McCausland.

St Johnstone: Fisher, Wright, Sanders, Mikulic, Franczak, Clark, Sprangler, Essel, Kucheriavyi, Kirk, Kimpioka.

Substitutes: Rae, Raymond, MacPherson, Carey, Smith, McPake, Douglas, Keltjens, Steven.

More of the respective problems at all four clubs playing today shortly, but let's get to the team news first...

The malaise around Ibrox remains despite what should have been a morale-boosting 3-0 victory over leaders Celtic on 2 January.

So much so that new chief executive Patrick Stewart called a special media conference on Saturday to address the issues and stress that the Glasgow club's board remains behind manager Philippe Clement.

Thursday's draw with Dundee - the eighth time in 11 away league matches Rangers have failed to win - followed by Celtic's victory away to Ross County on Saturday, leaves the Belgian's side 18 points adrift.

Stewart's promise to make "tough decisions" to improve the club on and off the park was not enough to prevent the Union Bears supporters association issuing a statement wanting Clement sacked, along with other board changes, and urging a mass walkout in the 55th minute of today's match at Ibrox.

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Sportsound's build-up to today's games has just begun on BBC Radio Scotland.

Former Scotland internationals Billy Dodds and Willie Miller are the pundits joining host Richard Gordon.

There's commentary of both games starting at 15:00, with Aberdeen v Hearts on Extra, Digital, MW and online, while Rangers v St Johnstone is on Sounds, FM and online.

Easiest way is just to press the appropriate button at the top of this page.

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Two more fixtures complete the Scottish Premiership weekend - and both feature sides chasing European qualification hosting teams battling against relegation.

Leaders Celtic and third-top Dundee United both recorded hard-fought away wins on Saturday, so now the pressure is on Rangers and Aberdeen to respond against St Johnstone and Heart of Midlothian respectively.

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

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