I'll keep talking about the goal, because little else is happening. Check out the move from the Gunners in the build-up. Seven passes, then the finish.

Image source, Opta

No surprise that the Arsenal goal came down the left - it's where most of their attacks have been forged.

Image source, Opta

Garth Crooks
Former Spurs striker on Final Score

"When Arsenal play at home they play a lot of silky stuff, and sometimes as a forward that can be difficult to adjust to. A good finish by Joel Campbell."  

Do you even need to ask who put the ball through for Campbell to get that goal? Mesut Ozil, who other than the assist master? Mini fist pumps for fantasy football managers everywhere.

John Motson
BBC Match of the Day commentator

Image source, Reuters

"It's the first time that Arsenal have been that penetrative in attack. The switch of Campbell to the left has been profitable."

The graphic below tells us that Arsenal have had 71% of possession. They've done nothing with it.

Image source, OPta

John Motson
BBC Match of the Day commentator

Image source, Reuters

"Arsenal are playing very flat and very square at the moment. It's because Sunderland have those five at the back."

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It's just opening up a touch more for the Gunners, with Mesut Ozil at the heart of everything. He's like the kid on the playground that's miles better than everyone else. Can Sunderland defend this way for the 90? 

Arsenal try a switcheroo. Joel Campbell to the left, Alex Oxlade-Chamberlain to the right. When they go forward, they hit that green barrier. Arsenal, by the way, are behind Tottenham as things stand.

Image source, Getty Images

Arsene Wenger is standing in the technical area, hands in pockets, no sign of his famous coat. With his suit, he looks like a dad who has come straight from the office to watch his son's school team. Arsenal have all the cohesiveness of a school team at the moment.

The start of this game has seen Sunderland partly abandon their park-the-bus plan. They are happier to be drawn out more often. Perversely, that might actually help Arsenal.

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The Emirates crowd grows restless, quite rightly, when the men in red try to play tiki-taka on the edge of their own box. When they finally get hold of it, they spend some sustained time around the Sunderland box.

Image source, AP

Arsenal are a little all over the show here, Sunderland looking more likely when they go forward. There's more movement from the men in green, more incision with the passing. Arsenal's front four are playing like strangers.

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And again! Too much space for Watmore, a cross, Mathieu Flamini pushing the ball towards his own net. Good save from Cech. Arsenal wobbly.

I tell you what, Sunderland have shown enough to suggest they might trouble Arsenal here. A free-kick on the right, some head-tennis, then Duncan Watmore nodding over. Good game so far.

Alex Oxlade-Chamberlain is holding the back of his head. It might not be serious, but the way things are going for Arsenal he could be out for the rest of the season.