Reece James from the edge of the box... deflected over.

We're reached the midway point in the second half. To be fair to Arsenal, they've made it more of a contest since the break.

Cesar Azpilicueta is forced into a last-ditch block to an Emile Smith Rowe shot, but the flag is up.

Albert Sambi Lokonga into the book. He simply couldn't cope with Romelu Lukaku and had to foul him.

This is unfortunate for Arsenal and for Kieran Tierney, who has had more than his share of injury trouble, and walks off with a bit of a limp to be replaced by Nuno Tavares for his home debut.

The rain is falling and the crowd are roaring. Putting aside the state the game is in, you have to love that we've got proper football back.

Rob Holding does superbly to stand tall, hold off Romelu Lukaku in the box and stick out a foot to clear the ball. The Chelsea striker looked like he was going to drive the ball over the line like he was in a scrum.

There is Aubameyang, firing a shot right into Edouard Mendy's midriff. Straight into the action with a crowd-lifting moment.

Clinton Morrison
Former Republic of Ireland striker on BBC Radio 5 Live Sports Extra

I don't understand that, you are chasing a game and you take off Saka. I would rather you sacrifice Cedric and go for it.

A huge cheer for Pierre-Emerick Aubameyang, who replaces Bukayo Saka. Well, if anyone in this Gunners side can do something to change the outcome of this game, it is PEA.

Clinton Morrison
Former Republic of Ireland striker on BBC Radio 5 Live Sports Extra

Should have scored. He has got to score. He is six yards out it is a free header. Once Holding gets there in front of Christensen it is marginally wide.

That is the moment!

From a corner, Pablo Mari heads the ball back into the mixer and Rob Holding, well-placed, heads wide of the post.

He should have scored. It should be 2-1. Arsenal are unlikely to get a better chance.

Just as Gabriel Martinelli looks to half a chance of getting away, back comes Andreas Christensen to snuff out the threat.

Nicolas Pepe is infuriating. His talent is clear to see and then he goes and stands to get flagged needlessly offside.

It almost really costs his side as Chelsea's next attack sees Mason Mount pull a shot wide.

Clinton Morrison
Former Republic of Ireland striker on BBC Radio 5 Live Sports Extra

I am bringing on Aubameyang now. It is time to make some changes to give the fans a lift and have a bit more threat going through the middle.

The live win probability is, as you would expect, heavily in Chelsea's favour.

The Blues have a 92% chance of winning the game from this stage, while Arsenal have a glimmer of hope at 1.4%.

Romelu Lukaku sees a volley blocked and Rob Holding nods the ball behind for a Chelsea corner.

Chelsea take the immediate sting out the Gunners with a bit off keep-ball. It doesn't stop the Gunners players chasing and harrying, though.

The home fans sounded shot earlier. They've come to life again now.

Save!

The corner is cleared but the Gunners keep the attack alive and test Edouard Mendy through a Bukayo Saka shot the Blues keeper tips over.

An Arsenal goal would make this really interesting.

Corner to Arsenal. The home fans like what they're seeing. Lifted by Tierney's efforts.

That's better from Arsenal! Kieran Tierney charges around after the Chelsea defence, forcing them to retreat and it stirs the crowd to life.

Soon after, Mari wins the ball off Lukaku. Life in the old dog yet.