Celtic have Kilmarnock pinned back into their own penalty box.

The nerves are being shredded in the respective stands.

Sead Haksabanovic goes down inside the Kilmarnock six-yard box as Lewis Mayo's long leg edges towards the Celtic winger's ankle.

Big shouts for a penalty. It looks 50-50, but there's no call for the referee to check the VAR screen.

It's still all Celtic. Kilmarnock can't clear their lines.

Desperate stuff from both sides but in different positions.

Celtic are piling on the pressure now.

Will they get what has become a traditional late goal?

The Viaplay Cup holders have seven minutes of stoppage time to avoid taking an exit at the first attempt this campaign.

Pat Bonner
Former Celtic goalkeeper on BBC Sportsound

That was a definite dive by Sead Haksabanovic. Never a penalty for me.

Celtic have two shouts for a penalty as Matty Kennedy blocks a Greg Taylor cross and there are claims of hand ball - then Sead Haksabanovic goes down.

Pat Bonner
Former Celtic goalkeeper on BBC Sportsound

Celtic just haven't been high enough up the pitch or in control of the game to create the chances and get that goal back.

Cammy Bell
Former Kilmarnock goalkeeper on BBC Sportsound

Kilmarnock are in control at the moment. They just need to keep their cool.

Celtic fashion a rare opening inside the Kilmarnock penalty box.

It falls to Yang Hyun-jun, but the South Korean forward's shot is deflected over by a flying challenge by Brad Lyons.

Derek McInnes freshens up his midfield as Rory MacKenzie and Liam Donnelly replace influential pair Danny Armstrong and Kyle Magennis.

Celtic have Kilmarnock pinned back in their own half.

But so far Derek McInnes' side are standing firm - just like they did against Rangers in the opening league game of the season.

The Ayrshire side are 13 minutes or so away from a quickfire Old Firm double.

Sead Haksabanovic is on for Matt O'Riley as Celtic boss Brendan Rodgers makes an attacking change in midfield.

Almost immediately, Kyogo uncharacteristically misses an attempted shot deep inside the Kilmarnock penalty box.

Marley Watkins has done his bit.

And the goalscorer is replaced up front with Kilmarnock captain Kyle Vassell.

Pat Bonner
Former Celtic goalkeeper on BBC Sportsound

I don't see where Celtic are going to get a goal at the moment. I know they have good technical players, but they are not creating the chances.

David Turnbull replaces in Odin Thiago Holm, who has had a quiet first start for Celtic.

Meanwhile, South Korean forward Yang Hyun-jun is on for Liel Abada.

Celtic have not lost a domestic cup tie since Rangers beat them in the Scottish Cup semi-final in April 2022.

The last time they lost in the League Cup was back in November 2020 to Ross County.

That proud record is in danger now.

Kilmarnock threaten after a fine passage of passing play.

Kyle Magennis collects the ball on his chest on the run and sends a dangerous dipping volley towards goal from 20 yards that goalkeeper Joe Hart turns wide at full stretch.

The former England number one then has to punch clear off a Killie head as the ball is launched back into the penalty box.

Kilmarnock forward Marley Watkins goes into the referee's book for a silly push on Kygo.

However, the home side survive the resulting free-kick in a dangerous position - and the corner that follows.