What. A. Game.

Maurizio Sarri’s first match at Stamford Bridge may never be bettered no matter how long he stays in west London.

In a breathless encounter, Arsenal pegged Chelsea back after going two goals down, but a late Marcos Alonso goal saw the Blues come away with a stunning 3-2 win.

Here’s what we learned.

Suicidal Arsenal

It didn’t take long for Maurizio Sarri to work out where Arsenal were vulnerable. And to be honest, you didn’t need to be a Premier League coach to realise where the north Londoners were gettable either. Like Afroman, Arsenal were almost comically high and with Sokratis and Shokdran Mustafi at centre-back, looked in danger every time the Blues got forward.

It was a simple ball over the top and a square pass across goal that resulted in Pedro’s opener, and on 20 minutes another easy long ball saw Álvaro Morata double their advantage.

If you’re going to play such a high line though, surely you need to employ a genuine sweeper keeper? Emery’s decision to pick Petr Čech again here was a baffling one.

Chelsea also looked blue at the back

As bad as the Gunners were in defence, they were definitely equalled by their Chelsea counterparts. If the west London side are going to do anything this season, then David Luiz and Antonio Rüdiger are going to have to get as far away from this team as possible.

Their lack of pace, positioning and tactical nous was woefully exposed on a day where Arsenal could have scored five before half-time. With Marcos Alonso and Cesar Azpilicueta bombing forward, it was down to those two to hold fort and extinguish the fires. If anything, they were doused in petrol and holding a match.

Jorginho could be signing of the season

An early shout, yes – but there’s every indication that Jorginho could well go on to be the signing of the season come May. The Italy international was sensational here – cutting through Arsenal with his range of passing and generally creating trouble from his deep-lying playmaker position.

There were some that wondered if the former Napoli man could take to the Premier League. After two games, those critics have already been answered. We can only imagine what Pep Guardiola must be thinking right now.

Goodbye Granit

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Another game, another completely average performance from Granit Xhaka topped off with his obligatory yellow card. That’s 18 bookings in just over two seasons for the Switzerland international, with the midfielder now becoming almost a parody of himself. He’s a hatchet man without the intimidation, a defensive midfielder who can’t defend, the opposite of nominative determinism.

Saturday was the time for an experienced head to calm everyone down and stamp (not literally) a mark on the midfield. Xhaka was a liability and it was no surprise to see Lucas Torreira come on at half time.

How long before he gets his place in the starting XI permanently?

The Barclays, boys and girls, is back

Let’s be honest, last weekend was a bit of a damp squib. Everyone you expected to win, won. No performance truly stood out as exceptional. There wasn’t one moment where you thought ‘wow’.

This though, this was something else. Breathless. End-to-end. Open. Completely mad. Loads of chances. Loads of mistakes. It was, in essence: the Barclays.

Neither team was perfect, but that’s why it was so brilliant. Welcome back, everyone.