Hearts dropped points in the Premiership for the first time this season on Saturday after being held to a draw by Livingston.

Rangers continued their recent scoring streak with five against St Johnstone on Sunday. Saints got one from the penalty spot in Glasgow.

St Johnstone manager Tommy Wright on Sportsound: "Tough game and hopefully we can make it tough for Celtic.

"We got two draws against them last year. We've been strong at home.

"Look at the team Celtic have put out, look at their bench. They've got quality throughout. Let's hope they don't click tonight.

"We gave too many easy goals away against Rangers on Sunday.

"Every season, clubs like ours, the cups give you a shot at glory. We have to be 100% tonight and we need Celtic to be 70-75% and then we can get a result."

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Rangers make six changes for the visit of Ayr United. Wes Foderingham takes over from Allan McGregor in goal, as he did in the last round, while Joe Worrall, Andy Halliday, Graham Dorrans, Ovie Ejaria and Glenn Middleton come into the team.

Connor Goldson and Scott Arfield drop to the bench while McGregor, James Tavernier, Daniel Candeias, Lassana Coulibaly and the ineligible Kyle Lafferty are not in the squad.

Halliday captains the side in Tavernier's absence.

Two changes for Ayr with Daniel Harvie and Jamie Adams in for Steven Bell and Michael Moffat, who are both on the bench.

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We've been asking since before last night's match who you think is most likely to reach the semi-finals of the League Cup. The poll closes at 19:30 BST.

Just one change for St Johnstone with Ross Callachan coming in for Matty Kennedy, who drops to the bench.

Holders Celtic restore Kristoffer Ajer, James Forrest, Olivier Ntcham, Callum McGregor and Odsonne Edouard to the starting line-up and also start with Scott Bain in goal.

Craig Gordon, Jack Hendry, Youssouf Mulumbu, Scott Sinclair and Ryan Christie drop to the bench and Mikey Johnston misses out.

St Johnstone: Clark, Foster, Tanser, Shaughnessy, Kerr, Callachan, Alston, Craig, Wotherspoon, Wright, Watt.

Subs: Mitchell, Anderson, Kane, Swanson, McMillan, Nydam, Kennedy.

Celtic: Bain, Lustig, Boyata, Ajer, Tierney, Forrest, Brown, Ntcham, McGregor, Edouard, Griffiths.

Subs: Gordon, Hendry, Sinclair, Morgan, Christie, Rogic, Mulumbu.

Celtic manager Brendan Rodgers was also asked whether there had been an offer from China for his services this summer and he responded: "There was an offer, yeah. My concentration was with Celtic. The season comes around and we move on."

Celtic manager Brendan Rodgers on Sportsound: "It's important for us to win every game. We're playing for our fifth semi-final so we're very determined to do that.

"It's not been all plain sailing this year. You've got to work hard, stay focused. We can have no doubt, at times we'll not get the results but we've got a plan and a blueprint that when we execute we win.

"It's football. Everyone probably looks at us because of our record but we're not perfect. We're only six games into the season as well. There's a long, long way to go."

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Rangers: Foderingham, Flanagan, Katic, Worrall, Halliday, Ross McCrorie, Dorrans, Ejaria, Kent, Middleton, Morelos.

Subs: Robby McCrorie, Goldson, Wallace, Rossiter, Kelly, Grezda, Arfield.

Ayr United: Doohan, Smith, Harvie, Adams, Rose, Kerr, Murdoch, Geggan, Crawford, Forrest, Shankland.

Subs: Hare-Reid, Bell, Ferguson, Docherty, McDaid, Moffat, Moore.

Two changes for Hearts with Arnaud Djoum and Callumn Morrison coming in for Ben Garuccio and Craig Wighton. Garuccio is on the bench.

Motherwell make four changes. Liam Grimshaw, Chris Cadden, Ryan Bowman and Curtis Main start in place of Peter Hartley, Elliott Frear, Conor Sammon and Danny Johnson. Frear and Johnson are substitutes.

Hearts: Zlamal, Smith, Dunne, Souttar, Mitchell, Naismith, Djoum, Haring, Morrison, Lee, MacLean.

Subs: Doyle, Bozanic, Amankwaa, Garuccio, McDonald, Mulraney, Dikamona.

Motherwell: Carson, Tait, Aldred, Donnelly, Grimshaw, Cadden, Campbell, Bigirimana, McHugh, Bowman, Main.

Subs: Gillespie, Taylor-Sinclair, Frear, Mbulu, Johnson, Turnbull, Maguire.

Aberdeen got the better of Hibernian on penalties last night after neither side could find the net in regulation or extra time.

The Dons have reached the semi-finals of the League Cup for the fourth time in six years.

Read last night's match report

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Sportsound's coverage of tonight's Scottish League Cup quarter-finals is under way. Listen on BBC Radio Scotland 810MW/DAB and here online.

There will be live commentary of St Johnstone v Celtic and updates from the other ties.

After last night's penalty drama at Easter Road, six more sides seek a place in the Scottish League Cup semi-finals.

Holders Celtic are at St Johnstone, Premiership leaders Hearts host league rivals Motherwell while Championship pacesetters Ayr United - the only second-tier side left in the competition - visit Rangers.

All ties need to be played to a finish tonight, with Aberdeen already through.

We'll have updates from all three matches here and the semi-final draw that follows.

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