Arsenal emerged victorious in the second north London derby of the season.
Goals from Martin Odegaard and Alexandre Lacazette saw the Gunners come from behind to beat Tottenham Hotspur who had taken the lead in the 33rd minute thanks to Erik Lamela's brilliant goal.
However, some Arsenal fans have found one incident to be unhappy about.
It happened in the second half when Gabriel Magalhaes cleared his lines with Spurs striker Harry Kane looking to close him down and win possession back for his side who came to life in the final 15 minutes when they were already 2-1 down.
But as spotted by Arsenal supporters on Reddit, Kane came crashing into the Brazilian after the ball had gone.
The general feeling was that the England international lead with his elbow which has left many rather angry at the fact that the striker's tackle did not even warrant a yellow card.
thejamielee said: "The level of protection Kane gets from refs is shameful. He will continue to be maliciously reckless until the hammer comes down on him."
Trench_Buckets said: "It’s not a booking. It’s a red card. Violent conduct with no intention of playing the ball.
BrianThatDude said: "Really disgusting."
carl_ZA said: "There was ZERO intent to play the ball. That's malicious all day long."
23grp said: "Straight Red!"
SafetyGoat said: "Not really an elbow, but yeah should have been an easy yellow for the ref to give."
Gabriel would end up having the last laugh.
From the rebound of Kane hitting the post from a free-kick, Sanchez guided an effort goalwards and with Bernd Leno in a seated position, it appeared that Spurs were about to equalise and deny the Gunners all three points.
But Gabriel got back in time to make a goal-saving clearance with his head.