Confirmation that this is Pierre-Emerick Aubameyang's first hat-trick in the Premier League, and first within the top five European leagues since September 2017 for Borussia Dortmund.

Another Leeds change. Niall Huggins, who is wearing the No 52 shirt, is on for Ezgjan Alioski. Huggins is a 20-year-old forward.

Joe Gifford: Seen a lot of people saying this is a one-off performance from Arsenal but it's not. Since the introduction of the youngsters we have been creating far more chances, only difference is Auba is now converting them. Encouraging signs.

Andrew Mitchell: Meslier just isn’t good with his feet - I know Bielsa has his footballing philosophy, but he either needs to adjust his tactics here or get a new keeper.

Bernd Leno is forced into a flying save to keep out Raphinha. It's going to require something extraordinary for Leeds to get anything from this.

Matty AFC: Great goal. I thought ESR [Smith Rowe] fluffed his shot but its a gorgeous pass. Another milestone for Aubameyang with his first PL hat trick.

Talk Da Ting: How long did we waited for this from our captain??? It has happened tonight.

Minhaz Uddin: All this Arsenal team needs is Ruben Neves and Pedro Neto!! For the title we can challenge!

Just before that goa, Marcelo Bielsa has reacted to that nightmare 45 minute showing by making a double change at the start of the second half.

On: Helder Costa, Tyler Roberts.

Off: Jack Harrison, Mateusz Klich.

Matthew Upson
Former England defender on BBC Radio 5 Live

If Aubameyang ever wanted to make a statement that he was back this hat-trick will do it.

Back under way.

Changes for Leeds coming up.

Pierre-Emerick Aubameyang has scored his 200th goal in Europe's top five leagues. Since the 2009-10 season when he debuted in Ligue 1 for Lille, he is the ninth player to reach 200 goals across the five divisions.

This fixture always had the ingredients to be a cracker but I didn't think it would be so one-sided. Three attempts on target, three goals. It's been a perfect 45 minutes for Arsenal. They haven't had too many of those this season.

Manchester United

Manchester United boss Ole Gunnar Solskjaer, speaking to BBC Radio 5 Live on the decision not to award a penalty for a challenge on Harry Maguire: "It's a foul and a clear penalty if he [referee] allows it to go on.

"I think Harry's offside when Bruno Fernandes hits the ball. Somebody must have been asleep. Too many times... one week it's a foul, one week not a foul, one week a penalty and another week it's not a penalty."

Daniel Stevenato: Has any Premier League team ever shot themselves in the foot so often in one season? Absolute kamikaze defending.

Matty AFC: Fantastic third goal. Delighted for Bellerin, a loyal servant who's been plagued by injuries!

Matthew Upson
Former England defender on BBC Radio 5 Live

Arsenal have had a helping hand from Illan Meslier, he's thrown a few in and the third was pretty shocking.

They have looked willing to drive forward and get into the box.

Pierre-Emerick Aubameyang looks to be enjoying himself which is what Arsenal fans want to see.

Arsenal have scored three first half goals in a Premier League game for only the second time under Mikel Arteta - last doing so in July 2020 v Watford.

Where has this Arsenal side been hiding all season?

Minhaz Uddin: Gotta love Saka!! Such a threat

Stuart Eccles: Instant karma for a terrible VAR decision to rule out obvious first pen.

Colin Bundred: Another goalkeeping joke! Absolutely insane

Matthew Upson
Former England defender on BBC Radio 5 Live

It's a hat-trick of mistakes for Meslier.

Awful goalkeeping on that near post - you cannot get beaten from that angle.