Back under way for the second half.

This was a big chance for Joe Willock earlier...

Steve Wilson
Match of the Day commentator

It was well over the top but that would've been an outrageous goal by Aubameyang!

As the time ticks on, the urgency increases...

Neil: You really get the sense that Arsenal are there for the taking but Newcastle are not good enough to do it.

Michael: Joelinton is struggling to walk quickly at this point - when are we getting Gayle on the he will get in this Arsenal defence

Mike: Why hasn't Arteta brought Lacazette on. Not even an Arsenal fan but he seems incompetent

Arsenal are growing into this game now and the chances are starting to open up. Kieran Tierney edges it inside to Bukayo Saka but the youngster fizzes a left-footed strike over the crossbar from distance.

Kieran Tierney has been excellent again, bursting down the left and standing a cross up for Pierre-Emerick Aubameyang to attack. The forward can only flick his header over the crossbar.

Aubameyang hits another effort on the volley moments later from a long ball, but it loops over.

Danny Murphy
Former Liverpool and England midfielder on BBC One

Mikel Arteta has made positive substitutions and he will now be hoping one of them can produce that moment of magic, that bit of skill to take them through.

Lovely footwork from Nicolas Pepe, skipping in off the right and shaping to curl an effort into the far corner with his left foot, but sending it comfortably wide from outside the penalty area.

Just under an hour to go until kick-off at Old Trafford.

Team news arriving shortly.

Textbook Andy Carroll, taking a goalkick on his chest and laying it off to a team-mate to start a Newcastle attack. He arrives in the box in an attempt to meet the following cross, but bundles David Luiz over.

Tommy: Arteta's loyalty to some of these players is really costing us this season. Not sure what he sees in some of these.

Markuuus: What do Willian and Pepe bring to the side? Absolutely nothing, slow, ponderous and lacking any idea. Guys are stealing a wage

Danny Murphy
Former Liverpool and England midfielder on BBC One

Bukayo Saka coming on for Arsenal always adds some life and creativity into this side. He's been brilliant this season. He looks super comfortable in any position he plays. He is really versatile.

Good pressure from Newcastle, closing the Gunners down as they look to play out from the back and Bernd Leno ends up clearing it out for a throw.

Jacob Murphy replaces Emil Krafth for the visitors.

A sad end to the half with Marcus Browne's injury. Brentford on top and in front thanks to Halil Dervisoglu's goal just after half an hour.

Bukayo Saka and Granit Xhaka are on in place of Willian and Joe Willock for Arsenal.

One of the picks of the round so far!

Good save! Martin Dubravka dives to his left to push Joe Willock's header behind for a corner. The midfielder got up well to meet Nicolas Pepe's smart cross but couldn't get enough power behind his header. That was a chance for Mikel Arteta's side.

Marcus Browne is still taking on oxygen and is being carried off on a stretcher now. Looks like a bad knee injury.

We'll have around two minutes of stoppage time to play before half time. Sam Folarin comes on as Browne's replacement.