Lovely ball again, Alex Mowatt again, Barnsley clip it to the far post but Callum Brittain is denied a second chance by Marcos Alonso's head this time.

Barnsley are playing a really high line, and are happy for the Chelsea back three to go over halfway, which means all 20 outfield players are condensed into a 40-yard pocket either side of halfway. Sling it over the top?

Half an hour gone and while it's goalless it's far from the worst FA Cup match I've watched this week.

Not the best either, admittedly, but we can't have a 5-4 every night.

Here's when Barnsley should have took the lead. Where's Ashley Ward when you need him?

Richard H: It is a farce that VAR is still being used in some games but not others in the same tournament. Stonewall pen. Another game in the round it would have been given. Had the game been happening at the Bridge, would have been given.

Staffs: So refreshing to watch football without VAR

Chelsea have turned the corner in this game now, having the ball much higher up the pitch and pinning Barnsley back.

Cauley Woodrow does really well to win the ball back from Andreas Christensen and stride away, he finds Alex Mowatt who shoots and swerves it wide.

Hard to disagree to be honest.

Lewis Starks: Another reason the FA needs to sort itself out. No VAR yet stonewall pen... In the SAME competition VAR is available. You can't have different rules for the same competition. Either VAR at all games or no games

Tammy Abraham is down and looking for a penalty again after a tangle with Mads Andersen on this occasion.

Nothing doing again and I don't think there was much in that.

It would 100% have been given as a penalty with VAR. Tammy Abraham was fouled.

Martin Keown
Former Arsenal defender on BBC One

It doesn't look like he gets the ball - if there was VAR here...That's why it is a step in the right direction, but we're frustrated in the way it is used.

Chelsea are growing into the game now, just moving the ball sharper and more direct in the last few minutes.

Here's where you need VAR...

Billy Gilmour plays a nice pass into the run of Tammy Abraham, Toby Sibbick slides in and takes the big man down and referee Martin Atkinson immediately signals that he won the ball.

It looked like that too at real speed but the replay shows he took out the England man's foot first.

Martin Keown
Former Arsenal defender on BBC One

Barnsley do not look overawed by the occasion, that's for sure.

Neil Johnston
BBC Sport at Oakwell

How costly will Callum Brittain's miss prove?

Barnsley have started really well but they won't get too many better chances than that.

Chelsea have just not got going and Thomas Tuchel is in and out of seat barking orders. He's really not happy.

Barnsley keeper Brad Collins is called into action for the first time and it's to prevent a spectacular own goal. Toby Sibbick puts in a tackle on Tammy Abraham and it loops up and on target and Collins has to get back sharply.

Barnsley have won both of their FA Cup meetings with Chelsea, winning 4-0 in the third round in 1989 and 1-0 in the quarter-final in 2008. They are well on top here as well.

BeauB: As a Chelsea fan it's looking a bit like Bradford City all over again. Playing it around at the back is inviting a Kepa howler.

Just seeing it again, Callum Brittain should score. His movement was great as he totally lost Marcos Alonso but his finish was tame.