Martin Keown
Former Arsenal defender on BBC One

It's good reactions from the goalkeeper, but Chelsea have looked nervy to that point.

Great save/bad miss! What a chance for Barnsley, they should be ahead.

Alex Mowatt floats in a cross from the left, it's flicked on in the middle and comes for Callum Brittain at the far post. He's only a few yards out but slams his shot into the body of Kepa.

The Tykes are well on top here!

VAR played a big part in the earlier win for Southampton so I should clarify that there's no VAR tonight in this one.

Herbie Kane to launch in a long throw for Barnsley but it's no Rory Delap, disappointing to be honest.

Chelsea haven't been out of their half yet, Barnsley will be delighted with this. The hosts are attacking the 'David Ginola' end.

It's a good, high-pressing start from Barnsley but Chelsea clear a corner well. Thomas Tuchel looks properly cold on the sidelines.

Martin Keown
Former Arsenal defender on Final Score

Barnsley are a big team, all over six foot in the back three, it's an area where Chelsea will certainly be tested.

I mean, let's all do that.

Geostorm?

Simon Mundy: More cup football. I tell you, if this game is as sterile and joyless as Sheffield v Bristol or Man U v West Ham, I'm turning over at 9pm to watch a Gerard Butler film. A GERARD BUTLER FILM!

Chelsea are in fact playing a back three with Emerson in there and Marcos Alonso and Callum Hudson-Odoi out wide.

We're off!

Chelsea

Chelsea boss Thomas Tuchel: "Any competition we want to win, this is what our club is all about, and that is the mentality we expect."

On the changes and young players

"They deserve it because they have shown on the training ground that I can count on them. We have to not over-do it today, they don't have to show everything today, just a solid team performance so the expectations are not too high on them. The main point is that we trust them."

Neil Johnston
BBC Sport at Oakwell

Chelsea have played three times since Barnsley were last in action.

Barnsley's home game with Derby on Saturday was postponed because of a waterlogged pitch and the ground staff are still out working on the playing surface right up to kick-off.

It's not quite the smooth green carpet Chelsea are used to.

Ideal conditions for a shock?

Yeah a friend of mine who supports Everton was saying exactly that last night.

Here come the sides at Oakwell!

Andy Rudd: Could have literally put my house on us pulling City after the epic win over Spurs, I despair

Harry Redknapp already booked as a studio guest.

Darren: Good ball skills there from Karen Carney to bring in AFC Bournemouth V Southampton, the tie of the round. Was willing it all the way

Chelsea have gone back to a back four tonight, and we think Marcos Alonso is at right-back.

Better than being left out of the 18 altogether I suppose. New starts everywhere.