Timo Werner replaces Kai Havertz. Just a wealth of riches.

Nothing comes of two back-to-back Chelsea corners but they've eaten up more time as the Blues close on victory. So will this...

Hakim Ziyech's shot is deflected over. Arsenal have punched themselves out. And they weren't exactly haymakers they were throwing.

Mark: I expected Arsenal to lose to Chelsea today, but the complete lack of tactical identity is worrying. 18 months in and it’s getting harder to see what Arteta is trying to achieve rather than easier.

Leno to Arsenal's rescue again. Kai Havertz is found on the overlap by Romelu Lukaku but his low shot, designed to nutmeg the Arsenal keeper, is saved.

Lots of empty seats around the Emirates now. The Arsenal fans are giving up and going home.

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

That is what happened for Chelsea last season. When the ball came out Timo Werner was not holding the ball up. Now they have got someone, even if they are under pressure they have got someone that can earn free kicks and throw-ins.

I think it has been a brilliant debut from Romelu Lukaku.

That is Mount's last act. He goes off with Hakim Ziyech coming on.

Almost 3-0. Romelu Lukaku feeds in Mason Mount, who's shot deflects at Leno, is saved by the keeper, who has to scramble to get a hand to the ball to stop another Chelsea man following up.

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

Chelsea have been too good for Arsenal this afternoon. Chelsea going for the title and Arsenal won't make it anywhere near the top four.

Gabriel Martinelli departs to be replaced by Folarin Balogun.

He has 10 minutes to try and help his side get something from this. No big ask, eh?

Romelu Lukaku looks up to the big screen to get a replay of that effort. He can't believe Leno has saved it.

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

What a save! I said goal straight away because Lukaku is so dangerous in that area.

Great save from Leno.

What a magnificent save!

Bernd Leno, take a bow!

The ball is chipped into the box and Romelu Lukaku looks certain to add to his tally with a fierce header, but the hand of Leno touches it onto the bar.

Wonderful.

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

How has no one got the end of that, it is a fantastic header back across the goal from Aubameyang.

The game continues and Arsenal continue to plug away. Pierre-Emerick Aubameyang's header into the box teases a chance for Emile Smith Rowe but Edouard Mendy is first to it.

The medics race on to tend to James, who thankfully soon sits up and then heads over to the touchline for more treatment. Phew.

This looks nasty. Reece James is flat out on the turf after landing heavily.

This is just taking the mickey now. Mateo Kovacic heads off and on comes World Cup winner N'Golo Kante.

The corner is half-cleared, but only as far as Mateo Kovacic, who slices his shot wide.