Aberdeen manager Jim Goodwin tells BBC Sportsound: "I'm delighted to get Leighton Clarkson over the line. Everything got finalised yesterday. He's not trained with the group, he came up late last night. He trained through the week with Liverpool, he was away with their first team on their pre-season tour. He's highly regarded down the road. He suits the way we want to play.

"With regards to Shayden [Morris], it's come too soon for him. We've decided to give it a miss today. He'll be available next weekend.

"It's a completely different set up to the game we faced last Sunday. I was trying to explain that to the new guys in the squad who aren't too familiar to the Scottish game. One thing about our league in Scotland, one week to the next you're playing against totally different opposition.

"Stephen Robinson has spoken openly about being a counter-attacking team. They are very dangerous on the break, and quite a physical team. Set plays will play a big part here today.

"I want to get back to playing free-flowing football that the fans appreciated and enjoyed during the cup games a few weeks ago."

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St Mirren manager Stephen Robinson tells BBC Sportsound: "The performance last week was excellent. So many positives, so many good things. Our lessons are you have to take your chances, obviously. We're creating a lot, very organised without the ball, and we'll need to be again because this is a tough test.

"Aberdeen have spent a lot of money getting in a really good squad. We have to be as disciplined as we were last week and try and play when we get the opportunity.

"They've brought in some very good players, knowing the market in England quite well. Good players don't take that long to bed in. I don't think it will make a blind bit of difference."

"We've signed well, brought some good players in. Jim has done exactly the same. We both now have a pre-season under our belts, we're both hoping to see improved performances and improved results."

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Kenny Crawford
BBC Sport Scotland at Stark’s Park

Two clubs who didn’t expect to be pointless after match day one, Raith and Dundee, meet in Kirkcaldy this afternoon.

It’s only the second league game of the season, but this pair are two of the favourites to occupy the top four positions come May so the pressure is on Ian Murray and Gary Bowyer’s sides to start producing results.

• Arbroath v Inverness CT
• Morton v Cove Rangers
• Partick Thistle v Hamilton
• Raith Rovers v Dundee

Kilmarnock manager Derek McInnes tells BBC Sportsound: "It's great to come to places like this and try and test ourselves, be good enough in the game to try and get something from it and try and enjoy a positive performance, but more importantly a positive result.

"There's no real pressure on my players other than the pressure that we put on ourselves to go and be as good as we can be. It will be a test today but really looking forward to the test.

"Kyle Lafferty's potential is huge in terms of what he can offer, he can be a game changer for us. He knows this stage well and he'll be determined, as they all are, to put in a good performance."

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Rangers manager Giovanni van Bronckhorst tells BBC Radio Scotland's Sportsound: "Of course we want to have a much better performance than we did on Tuesday [2-0 defeat at Union SG].

"We are very determined to get a good performance in today. It's good to have Alfredo (Morelos) back after five months.

"Ryan (Kent), it came too early today. We are pushing hard to get him ready for Tuesday."

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A wee update on Martin Boyle's return to Hibernian, with BBC Scotland's Brian McLauchlin telling Sportsound listeners that the winger has agreed a three-year deal, with the option of a further 12 months.

Pat Bonner
Former Celtic goalkeeper on BBC Sportsound

Celtic manager Ange Postecoglou tells BBC Scotland: "The pitch looks great and it'll be a cracking atmosphere.

"Our trips here last season were difficult games that we overcame, which was great to see.

"Overall, we still controlled the game comfortably but it's a different challenge today. We need to play our game, stick to the task and when we do that we are hard to stop.

"Moritz comes in as Stephen Welsh was a bit ill after training yesterday.

"This game came too quickly for Reo Hatate but Dave’s [Turnbull] had a strong pre-season."

Ross County manager Malky Mackay tells BBC Scotland: "The attendance will be huge, the pitch is like a bowling green, it will be a tough game today but it could be great for the club.

"I know the quality of Ange's team and the threat they pose, they were a great team last season but at the same time we need to make sure we come out and play to our strengths as well.

"The first half last week [against Hearts] was the best I felt that we'd played since I came to the club. We didn't take our chances but it gives me hope that this new group can gel together quickly.

"What we've managed to do this year is get more players under contract so the turnover with loans is much less for next season."

Michael Stewart
Former Hearts midfielder on BBC Scotland

Celtic manager Ange Postecoglou makes two chances from the side that won 2-0 against Aberdeen last week.

Midfielder Reo Hatate is out due to an injury with David Turnbull coming into the starting XI. On-loan central defender Moritz Jenz also makes his first start after being an unused substitute last weekend, with Stephen Welsh dropping out due to illness.

Carl Starfelt returns to the bench too, along with James McCarthy.

Malky Mackay also makes two changes from the side that lost to Hearts last weekend.

David Cancola and Harry Paton are into the hosts' starting line-up with Owura Edwards and Josh Sims dropping to the bench.

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Much of the talk before today's match Ibrox was about whether Alfredo Morelos would feature for Rangers against Kilmarnock. If he does, it will be as a substitute.

Ridvan Yilmaz makes his full debut in one of four changes to the side that lost 2-0 to Union Saint Gilloise on Tuesday, with Steve Davis, Scott Wright and Tom Lawrence also coming in. Rabbi Matondo, Glen Kamara, Ryan Jack and Borna Barisic drop to the bench.

For Killie, there are three changes. Jeriel Dorsett debuts in defence in place of Lewis Mayo, who cannot play against parent club, while, further up the park, Fraser Murray and Liam Donnelly take over from benched duo Kerr McInroy and Liam Polworth.

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Just the one change for Aberdeen, with Liam Scales coming in for Dante Polvara. The Irishman was ineligible to face his parent club, Celtic, last weekend, and as such makes his league debut for the Dons.

No place for midweek signing Shayden Morris, but this morning's arrival Leighton Clarkson is straight onto the bench.

Three changes for St Mirren. Richard Tait, Curtis Main and Greg Kiltie all start, with the latter returning from suspension. Mark O'Hara misses out through concussion protocols, Scott Tanser drops out completely, and Alex Greive is named on the bench.

19-year-old Fraser Taylor could make his league debut from the bench, having appeared in the League Cup group stages.

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Interim boss Steven Hammell makes two changes to his Motherwell line-up after his temporary stint in the dugout began with a hard-fought win at St Mirren.

Ricki Lamie was sent off in Paisley, so misses out today, while Jake Carroll also drops out of the squad.

Scotland full-back Stephen O'Donnell and Bevis Mugabi are elevated from the bench.

A solitary alteration for St Johnstone boss Callum Davidson, who saw his side sucker-punched by a late Hibernian goal on the opening day.

Murray Davidson is suspended after his red card, so Cammy MacPherson comes into midfield.

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After a season in the second tier, this is Kilmarnock's first visit to Ibrox since February 2021.

The Ayrshire club have lost on their past three trips to sunny Govan but did manage two league draws in 2018-19 and a win and a draw in the previous campaign when Scotland gaffer Steve Clarke was at the helm.

Alfredo Morelos is back in the Rangers squad and that could be bad news for the visitors since the Colombian has racked up 11 goals against Killie over the years.

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Celtic won all four meetings with Ross County last term, with an aggregate score of 11-1.

However, both games in Dingwall were close encounters. Anthony Ralston nodded in a 97th-minute winner in December, while Jota banged in a second goal after 87 minutes to make sure of the points in a 2-0 success in April.

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Tyrone Smith
BBC Scotland at Pittodrie

After opening weekend defeats, Aberdeen and St Mirren will be hoping to get themselves on the winning trail at Pittodrie.

After losing to Celtic, the new-look Dons will see the forthcoming run of games as an opportunity to build some real momentum, while the Paisley side were frustrated at home to Motherwell hot on the heels of their hugely disappointing League Cup group exit.

Recent history favours the visitors, with Aberdeen mustering just one win from the four meetings last term.

Aberdeen: Roos, McCrorie, Stewart, Scales, Coulson, Ramadani, Richardson, Besuijen, Hayes, Kennedy, Miovski.

Substitutes: Lewis, Duk, Watkins, Clarkson, Polvara, Duncan, Milne, Roberts, Ramirez.

St Mirren: Carson, Tait, Shaughnessy, Gallagher, Dunne, Strain, Baccus, Erhahon, Kiltie, Ayunga, Main.

Substitutes: Urminksy, Flynn, Reid, Taylor, Henderson, Olsuanya, Offord, Greive, Brophy.

Ross County: Laidlaw, Randall, Baldwin, Iacovitti, Purrington, Cancola, Tillson, Paton, D. Samuel, Hiwula.

Substitutes: Eastwood, Owura, Dhanda, Sims, Johnson, Loturi, Harmon, Olaigbe, White.

Celtic: Hart, Juranovic, Jenz, Carter-Vickers, Taylor, McGregor, O'Riley, Turnbull, Jota, Maeda, Kyogo.

Substitutes: Siegrist, Startfelt, Giakoumakis, Abada, Mooy, McCarthy, Bernabei, Forrest, Ralston.

Motherwell: Kelly, O'Donnell, McGinn, Mugabi, Solholm Johansen, Maguire, Goss, Spittal, Morris, Shields, Van Veen.

Substitutes: Fox, Efford, Ojala, Cornelius, Tierney, Mahon, Wilson, Spiers, Ferrie.

St Johnstone: Matthews, Wright, McGowan, Mitchell, Considine, Montgomery, MacPherson, Hallberg, Carey, Murphy, Bair.

Substitutes: Paris, Kucheriyavi, Mahon, Gordon, Crawford, Ballantyne, May, O'Halloran, Brown.