Just looking back at that first goal for Kyogo Furuhashi in Birmingham blue, it might be a weak backpass from Dovydas Sasnauskas but goalkeeper Adam Davies may also have to take some of the responsibility.

He hesitates rather than coming towards the ball and it allows Demarai Gray to take the ball away from him.

Either way it's more ridiculous defending from the Blades.

Some slick approach play from the Foxes with Will Alves sending Kasey McAteer blazing down the right and into the box where his low cross-shot flicks off a defender's heel and somehow evades the lurking Jeremy Monga at the far post.

George Johnston has come on to play at the back for Bolton, with Daeshon Lawrence the unfortunate man sacrificed for the reshuffle.

Andy Giddings
BBC Radio Sheffield commentator

It is all a bit scrappy now. We had Blues in control in the opening stages and were gifted the lead.

But now possession is all a bit we have it, no you have it - it is all over the place.

Image source, Rex Features

Lightning break from Wednesday and Ike Ugbo sends Charlie McNeill racing clear.

Defender Sam Inwood slides in desperately on the edge of the box but gets none of the ball and Oliver Langford takes about two seconds to brandish the red card.

McNeill sends the subsequent free-kick straight into the wall, however.

Bolton have been on top, popping it about nicely, but they are now a goal down, and a man down.

Ian Clarkson
Ex-Birmingham captain on BBC Radio WM

You have to give Demarai Gray some credit there!

He managed to just touch it with his weaker foot round the keeper. He would of known once it is past the keeper it is surely a goal to tap in in for Kyogo Furuhasi.

It is the perfect start for Blues.

Almost an instant response from the visitors.

Ehije Ukaki tries one from distance and it dips just over.

Bolton's Aaron Morley gets a wallop after a high-speed collision with Bruno Fernandes.

No, don't worry Man Utd fans, not that one.

Wednesday's 19-year-old debutant midfielder, who is also Portuguese, perhaps unsurprisingly.

Another penalty shout as David Kasumu runs at the back-tracking Ben Nelson in the area, he cuts inside and seems to slip amid a tangle of legs, but once again David Webb says no penalty.

This looked a worse shout than the earlier one, in fairness.

Nelson is going to get a lot of people running at him tonight though, you'd expect.

The home side almost ahead from their first corner.

It's sent in low to the near post but Kyogo Furuhashi fails to get a proper connection on his header and the danger is cleared.

The striker was on his own there - should have done better.

Adam Oxley
BBC Radio Sheffield

Sheffield Wednesday are leading here and it is giving similar vibes to last night that the team that weren't expected to win just like Doncaster are putting up a fight.

I'm not saying Wednesday will win 4-0, but it is certainly good to see and they are showing great composure so far.

Jeremy Monga comes with a big reputation, but this is not a reputation he'll want.

The 16-year-old has looked very bright, and not just because he is wearing Leicester's baby pink away strip, but this time he drives into the area with stepovers flying left and right before throwing himself to ground as he drifts past Lynden Gooch.

There was no contact and ref Oliver Langford whips out the yellow card for simulation.

Image source, PA Media

We are under way in the 20:00 (BST) kick-off in the Midlands.

Birmingham boss Chris Davies makes six changes from the side which started Friday's 1-1 draw with Ipswich Town.

The changes include a debut for on-loan goalkeeper James Beadle.

Sheffield United swap out 10 players from the 4-1 hammering at home to Bristol City on Saturday.

Callum O'Hare is the only player retained from that opening day defeat.

Both sides have gone strong on the bench, just in case...

Ethan Erhahon intercepts a pass and tries his luck from range, trying to get the Trotters back into it, but Owls keeper Pierce Charles gathers at the second attempt.

Image source, Rex Features

These two will become familiar with each other over the course of the next nine months with two league fixtures to come as well as tonight's EFL Cup first round tie.

They come into this evening's game with very different outlooks.

All is bright and beautiful in the Birmingham garden - a record-breaking promotion, redevelopment plans for their stadium, ambitious owners and a promising return to the Championship stage last Friday.

Things aren't quite so well ordered in the Blades' backyard - an agonising play-off final defeat last season, a parting of the ways with a popular boss and a 4-1 hammering to open the campaign under the new head coach.

Two-time winners of this cup, Blues also have a 100% record against Sheffield United in this competition with two wins from two meetings.

Given their illustrious history, two semi-final appearances (both lost 3-2 on aggregate) is a pretty poor return for the Blades in this competition and they haven't been past the third round for a decade.

Leicester defender Ben Nelson has a sheepish look on his face after dangling a leg in the box leading to howls for a penalty from the home faithful, but referee David Webb says nothing doing.

Lucky boy.