Arsenal put themselves in the box seat for a top-four finish with a 2-0 victory over Manchester United at the Emirates.
The Gunners leapfrogged their opponents into fourth place with the win – and sit just a point adrift of third-placed north London rivals Tottenham .
Unai Emery’s men scored a goal in either half with Granit Xhaka breaking the deadlock from long range. The shot swerved and wrongfooted David De Gea in the United goal.
Pierre-Emerick Aubameyang doubled their advantage from the penalty spot after Fred felled Alexandre Lacazette in the box.
Here are five talking points from the Emirates…
1. Lukaku’s big six record questioned again
Jamie Redknapp baffled Sky Sports viewers by claiming Romelu Lukaku was looking sharp just as a graphic popped up showing his goal tally agains the ‘big six’.
Put simply, it’s not very good.
To be fair, the Belgian has looked more like the striker we know he can be under Ole Gunnar Solskjaer but he struggled at the Emirates.
Having been fed with a delightful through ball from Fred in the second half, Lukaku failed to finish off the chance as Bernd Leno saved.
As the saying goes, the stats don’t lie.
2. Emery’s changes pay off
They used to call Claudio Ranieri The Tinkerman but Arsenal boss Unai Emery is making a bid for the crown this season.
He made five changes to the admittedly weakened side which lost to Rennes in the Europa League in midweek but once again he reaped the rewards.
Mesut Ozil made a rare start against a direct rival and produced a solid display while Ainsley Maitland-Niles did his reputation no harm.
3. What a difference a keeper makes
David De Gea may well be one of the best, if not the best, keepers in the world, but his mistake in the first half cost United dearly – and his opposite number kept Arsenal in the game.
Gary Neville’s theory that De Gea is distracted by his ongoing contract talks may make good headlines but is patently not true.
Bernd Leno on the otherhand showed why the Gunner’s No.1 position was such a topic of discussion over the years.
Until Petr Cech arrived, there were numerous question marks over Manuel Almunia, Lukas Fabianks, Wojciech Szczesny and David Opsina, but Leno’s crucial save from Lukaku kept his side front.
4. Clubs must take action over intruding fans
Just hours after Jack Grealish was assaulted by a Birmingham fan in the Second City derby, a supporter ran on to the Emirates pitch to celebrate Arsenal’s second goal.
On his way to the players, he pushed Chris Smalling and goaded Paul Pogba before being removed from the field.
Pitch invaders are nothing new – they’re often naked and drunk – but this new breed will surely see someone get seriously injured, or worse, before too long.
Clubs must do more than ban the thugs retrospectively.
5. St Totteringham’s day?
Arsenal fans must have been long resigned to finishing some way behind their bitter rivals this season but their recent renaissance – and Tottenham’s faltering form – has seen them reduce the gap from 10 points 16 days ago to just one with eight games of the season remaining.
Chances are Tottenham will take the Champions League more seriously than the Gunners do the Europa League (if they progress) and that could see the red half of London lauding it over their neighbours once again.