Liverpool can nine points clear at top after Spurs lose to Wolves
Man City can diminish gap when they face Southampton on Sunday
Maitland-Niles gives Arsenal lead, putting away low Iwobi cross
Firmino scores twice in two minutes - puts away loose ball and then stunning individual goal
Mane finishes pass from Salah, who wins and scores penalty for fourth, Firmino adds penalty for his hat-trick
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Brianna: Incredibly lenient by the ref Xhaka should be off.
Femi: Lucky. Arsenal should be down to 10 men.
August: Xhaka should be off. No reason why that wasn't two yellows, poor from the ref.
Sam: Why aren't the media making more of Xhaka's potential sending off than Mane's? Mane literally chokes Lichtsteiner - shouldn't even be on the pitch when he scores.
Image source, ReutersLiverpool 3-1 Arsenal
Arsenal win the ball back in midfield and set Alex Iwobi free on the left. He slips it inside to Pierre-Emerick Aubameyang, who flicks it on for Ainsley Maitland-Niles. The 21-year-old has a pop from the edge of the box but it's always rising.
Arsenal attack again down the right but Aaron Ramsey's half-volley doesn't test Alisson.
Liverpool 3-1 Arsenal
Plenty of tough tackles going in. Aaron Ramsey kicks the underside of Georginio Wijnaldum's boot in a 50-50 challenge and comes off worse. He's getting a bit of treatment.
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Given our second half performances, I am going for a 4-3 arsenal victory.
Ajay the Gooner
Liverpool 3-1 Arsenal
It's settled down a little bit now. Liverpool look in control and are happy to pass it around through the middle and around the back.
Arsenal trying to press whenever they can but they are being stretched.
Liverpool 3-1 Arsenal
Alan Kennedy
Former Liverpool left-back on BBC Radio Merseyside
There’s more goals in this but credit to Arsenal. They’re coming forward and still want to get back in the game.
The next goal is absolutely crucial. Arsenal are so dangerous going forward.
Image source, ReutersLiverpool 3-1 Arsenal
Phil McNulty
BBC Sport chief football writer at Anfield
If there is one team you cannot display this sort of defensive frailty against it is Liverpool - and Arsenal are extremely frail.
Liverpool are deadly enough as it is without the sort of assistance they are getting from Unai Emery's team.
Arsenal are no slouches themselves going forward but Liverpool are threatening them every time they attack.
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Fabian: Someone give this Liverpool team the league, they mean business.
Bezaleel: The Liverpool front three at it again.
Fred: Lichtsteiner deciding not to mark Salah, genuinely baffled as to how he gets picked each week.
Liverpool 3-1 Arsenal
Image source, .What rating would you give Roberto Firmino so far? You can rate the players out of 10 all the way until 30 minutes after kick-off - try it out here.
Liverpool 3-1 Arsenal
Liverpool press high and win the ball in the final third through Georginio Wijnaldum but Arsenal clear their lines.
It's straight back to Virgil van Dijk though and Liverpool will start another attack.
Liverpool 3-1 Arsenal
Granit Xhaka is very late on Andy Robertson and rightly gets a yellow card. Liverpool fans want a red - and he's a little lucky to avoid one.
Image source, ReutersLiverpool 3-1 Arsenal
Alan Kennedy
Former Liverpool left-back on BBC Radio Merseyside
It’s just a long ball really. It’s a poor corner but Liverpool had seven players in the box to aim for.
Arsenal couldn’t defend the cross. Mo Salah finds himself one on one with the goalkeeper and plays in Sadio Mane. It was a wonderful, wonderful finish.
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Michael: Unai Emery had all summer to sort out the arsenal defence..and somehow he failed in that department...can't remember the last time Arsenal kept a clean sheet.. Real joke...
Wolfenstein: Just wish the transfer window could open right now, we are getting the bashing of our life from Liverpool.
Max: If Arsenal had any sort of a defence, we would be frightening..
Sadio Mane
A long diagonal ball forward catches the Arsenal defence out and Mohamed Salah smartly lays it off for Sadio Mane to tap it into an open goal from a few yards out.
Image source, ReutersLiverpool 2-1 Arsenal
Sead Kolasinac deals with a ball over the top but his pass back to Bernd Leno is way to pacey and the keeper won't get there to prevent a corner.
Liverpool's corner is a poor one and Arsenal get it clear.
Liverpool 2-1 Arsenal
There's players sliding in everywhere to try and win the ball in midfield as it bobbles between the two teams.
Eventually, Mohamed Salah decides he's had enough and smashes it high into the air. Bernd Leno picks it up in his box and Arsenal can come on and treat Lucas Torreira, who seems to have picked up a knock.
Liverpool 2-1 Arsenal
Arsenal are threatening from set-pieces...
Image source, Getty ImagesLiverpool 2-1 Arsenal
The ball is curled into the box by Lucas Torreira and Shkodran Mustafi gets his head onto it. Alisson reacts well to tip the ball onto the top of the crossbar before the flag goes up for offside.
The Liverpool keeper didn't know that though.
Liverpool 2-1 Arsenal
Andy Robertson is beaten by the pace of Ainsley Maitland-Niles and he gives away a foul and goes into the book.
Free-kick for Arsenal on the right wing.
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Dax: Arsenal v Liverpool has got really dull in the last 8 mins. No goals!!
Charlie: Didn't even get a chance to open whatsapp and poke fun at my Liverpool supporting friends
Anon: It's seems as I watch the updates on the BBC Sport App, every time I refresh - there is a goal. The internet can't even keep with Liverpool atm, and I've got 4G!