Stylish Dembele finish doubles Celtic lead
Forrest ends mazy run with left-foot strike
Rangers and Greenock Morton already through
Celtic v Alloa Athletic (19:45)
Jack Ross, pictured below taking in Celtic's weekend draw with Inverness, has guided League One Alloa to 11 wins out of 12 this season, including five wins in the League Cup.
Image source, SNSCeltic v Alloa Athletic (19:45)
Jozo Simunovic, who missed the start of the season injured then saw a move to Torino fall through, returned for Celtic as a substitute on Sunday at Inverness.
The Croatian gets his first start of the season tonight, partnering Kolo Toure in central defence.
Image source, SNSCeltic v Alloa Athletic (19:45)
Craig Gordon, who has been on the bench in recent weeks, returns to the starting line-up in one of five changes for Celtic.
Jozo Simunovic makes his first start of the season with Kolo Toure also back in defence.
Stuart Armstrong and James Forrest earn starts while Christian Gamboa, Erik Sviatchenko, Callum McGregor and Scott Sinclair drop out.
Alloa are unchanged from the side that started the weekend win over Queen's Park.
Image source, SNSCraig Gordon is back in goal for Celtic this evening
Sportsound has started on BBC Radio Scotland. Listen here by clicking the audio icon or tune in on 810MW/DAB.
Goalkeeper Joe Lewis is hoping to create some memories to match Aberdeen's win over Inverness Caledonian Thistle in the Scottish League Cup final of 2014.
The Dons host St Johnstone in this season's quarter-final on Thursday.
"The lads have spoken about that," the 28-year-old who signed from Cardiff City this summer said of that previous triumph.
"It gets mentioned every now and then and there are plenty of photos around the place reminding you of that win.
"It does make you hungry to get a bit of that and we have an opportunity on Thursday night to get into the semi-final, if we can win, and something we will relish."
Image source, SNSJoe Lewis joined Aberdeen after leaving Cardiff City
St Johnstone defender Brian Easton is taking confidence from the Perth side's recent record against Aberdeen as they bid to reach another semi-final.
Saints, seeking a fourth last-four appearance in four seasons, are unbeaten in their previous three match-ups with Thursday's hosts and have only lost once in their last seven, including three visits to Pittodrie without a loss.
"I watched Aberdeen against Dundee and they were impressive," Easton said ahead of the Scottish League Cup quarter-final.
"They can be clinical if you give them chances, but we have no fears going to Aberdeen.
"We seem to do really well against them. I don't know if it is the way we play and they find us hard to break down."
Image source, SNSBrian Easton (left) helped Saints beat Aberdeen 5-1 at Pittodrie in October
Scotland's women's team have qualified for the finals of their first international tournament, the Euro 2017 finals in the Netherlands.
Their male counterparts have not reached a major finals since the 1998 World Cup.
While there are few parallels between the extent of the challenge faced between the men's and women's national teams, Richard Wilson suggests four things that Gordon Strachan team could learn from the success achieved by Anna Signeul's squad.
Are there any more? Give us your thoughts @BBCSportScot or on the BBC Sport Facebook page.
Image source, SNSAnna Signeul's squad are going where Gordon Strachan's have not
Captain Ryan Jack, who continues to be sidelined with a knee injury, is Aberdeen's only absentee for Thursday's Scottish League Cup quarter-final at home to St Johnstone.
Manager Derek McInnes hopes to have the midfielder back in action following next month's international break.
Saints midfielders Danny Swanson and Chris Millar are expected to have recovered from the minor injuries that kept them out of Saturday's Premiership win over Hearts.
But defenders Keith Watson and Tam Scobbie are still on the sidelines through injury, which leaves the Perth side short of options at right-back as Richard Foster, who has already played for Ross County in the competition this season, is cup-tied.
Image source, SNSChris Millar and Danny Swanson are in the running to return for Saints
Rangers midfielder Andy Halliday says "it was certainly one of the proudest moments of my career" to captain Rangers in their 5-0 Scottish League Cup defeat of Queen of the South.
The 24-year-old took over the armband with normal skipper Lee Wallace having been rested for Tuesday's game at Ibrox.
Halliday, a lifelong Rangers fan, led his side out for the first time one week after his training-ground row with Joey Barton led to the English midfielder being suspended by the club for three weeks.
"It's fair to say it's something I dreamed of for a long time," Halliday, who also scored Rangers' second goal, told Rangers TV, external when asked about being captain.
"There's been many, many great football players who have captained this legendary club and to be added to that list, albeit for one game, is a phenomenal achievement for myself.
"Most importantly, it was a 5-0 victory. I thought we were back to our free-flowing best."
Image source, SNSAndy Halliday (right) scored for Rangers against Queen of the South
#bbcsportscot
#bbcsportscot
#bbcsportscot
Alim Ozturk has lost the club captaincy at Hearts to United States midfielder Perry Kitchen.
Turkish central defender Ozturk has made only one appearance this season amid speculation about his future with the Premiership club beyond the end of his current contract at the end of this season.
The 24-year-old Kitchen joined Hearts in March after leaving DC United.
Head coach Robbie Neilson told his club website: “I’ve been impressed by Perry’s attitude, desire and, of course, his performances from day one.
“He’s a natural and leads by example both on and off the park. He’s also a really good player and will inspire those around him to reach the highest standards.
"I’d like to thank Alim for the huge part he played, and will continue to play, in helping the team to the top end of the league."
Image source, SNSPerry Kitchen has taken over the captaincy from Alim Ozturk
Another classic Pittodrie meeting of Aberdeen and Rangers to preview this weekend's encounter.
Celtic v Alloa Athletic (19:45)
Tonight's opponents, Celtic and Alloa Athletic, last met in the Scottish League Cup on 4 September 1996 when Andreas Thom (pictured below) was one of Celtic's scorers in a 5-1 win at Firhill.
The Spice Girls' Wannabe was top of the charts that week...
Image source, SNS#bbcsportscot
#bbcsportscot
We have been discussing St Mirren's moves to bring in Billy Davies as successor to the sacked Alex Rae. The former Motherwell, Derby and Nottingham Forest manager is in talks with the Paisley outfit, but an unlikely candidate has popped up in the mix to become the new St Mirren manager.
BBC Scotland's Chick Young, a long-time St Mirren fan, has emerged as the bookies' ninth favourite for the job, ahead of the likes of Ian McCall and Ally McCoist at 25-1.
The bad news for Chico is that he was as low as 16-1 a couple of days ago, so his odds of landing his dream job are lengthening.
Still, if the eight candidates in front of him all knock-back the job.......
Image source, OddscheckerBBC Scotland's Chick Young appears in the betting to be named the next St Mirren manager
Image source, SNSChick Young interviews another man reportedly in the frame for the St Mirren job, former Buddies boss Gus MacPherson
#bbcsportscot