Arsenal have not given up yet, mind. Olivier Giroud wins a free-kick from Ramires about 40 yards out. The Gunners send as many men forward as they can into the Chelsea area... but the delivery from Aaron Ramsey is poor and does not reach any of them. A massive waste.

Pat Nevin
BBC Radio 5 live

"It's a bad tackler's challenge from Cazorla. He's a guy who's not very good at tackling. He tried to pull out but he caught Fabregas and he had to go. There was not an ounce of malice in the challenge, but he had to go."

The points are in the bag, or may as well be, for Chelsea but Diego Costa still seems determined to pick a fight with every member of the Arsenal defence. No wonder Jose Mourinho wants to get him off the pitch before he gets a second booking too.

Costa basically got Gabriel sent off earlier, and he is going off now too - to be replaced by Loic Remy.

Any hopes of an Arsenal fightback are surely over now though...

Santi Cazorla was already on a booking and is shown a second yellow card after sliding in late on Chelsea midfielder Cesc Fabregas.

The Gunners are down to NINE men.

This is a decent little spell by Arsenal but they need to make it count. At the moment that is not happening Theo Walcott sees his shot deflected wide but Chelsea easily clear the resulting corner.

Chelsea are too slow when they break forward and it is Arsenal's 10 men who look more of a threat when they have the ball. Hector Bellerin's cross looks to pick out Olivier Giroud but Kurt Zouma is up to head it to safety.

Pat Nevin
BBC Radio 5 live

Image source, Getty Images

"I'm looking forward to Arsene Wenger's post-match press conference already, but there's a lot of time left in this match. 

"Since Chelsea's goal, Arsenal have fashioned one or two half-chances. This is certainly not over yet."

A final throw of the dice by Arsenal boss Arsene Wenger as Alexis Sanchez and Mesut Ozil are replaced by Olivier Giroud and Alex Oxlade-Chamberlain.

Chelsea are completely dominant at the moment in terms of possession but cannot fashion a shooting chance, with Diego Costa losing out to Laurent Koscielny. While it stays at 1-0, Arsenal are still in this.

Calum Chambers has done pretty well in the Arsenal defence since coming on at half-time but Eden Hazard is too quick for him here. That's a yellow card for the centre-half.

Before today, Kurt Zouma had scored in the FA Cup and League Cup for Chelsea, but never in the Premier League.... he has put that right now.

Image source, Getty Images

A change for Chelsea. Oscar has been impressive in defence and attack (and midfield) for the Blues today, but he is carrying a knee injury and is being replaced by Ramires.

Arsenal's 10 men are giving this a good go in the circumstances but they have to be careful - Chelsea are finding space down the flanks and Eden Hazard skips clear down the right before firing a low shot a few inches wide of Petr Cech's right-hand post.

Pat Nevin
BBC Radio 5 live

Image source, Getty Images

"This is no longer such a good game to watch now that Arsenal are down to 10 men, but there's still plenty of tension here."

Another sniff for Arsenal as Theo Walcott tries his luck from the left-hand corner of the box but his shot curls a long way wide. Referee Mike Dean had allowed the advantage after Oscar fouled Laurent Koscielny but did not forget it, and books the Brazilian.

Pat Nevin
BBC Radio 5 live

"A great chance for Sanchez. He had to snatch at it because the ball came from a strange angle, but that was an excellent chance for Arsenal in these circumstances."

You can listen to live commentary of this fixture via the Live Coverage tab at the top of this page.

Arsenal's 10 men are all behind the ball when Chelsea have possession, but looking to spring forward when they win it back. There are long spells where the Blues are just spraying passes around though.

This is better from the Gunners though. A high ball into the Chelsea box has Kurt Zouma stretching and struggling but Alexis Sanchez cannot make proper contact as it bounces through. He was under pressure from Branislav Ivanovic but you would expect better from the Chilean.

So, how do Arsenal's 10 men respond to this? Not too well so far - Eden Hazard has just brought another good save from Petr Cech with a stinging shot from the edge of the area.