It was Arsenal's day in the north London Derby, unequivocally.

Tottenham looked off the pace, but that should take nothing away from the Gunners' fine display.

Goals from Shkodran Mustafi and Alexis Sanchez sealed a 2-0 win to put the hosts within touching distance - just a point, in fact - of their bitter rivals.

While Arsene Wenger's men deserved their bragging rights, claiming them was nothing if not controversial.

Mauricio Pochettino and his backroom staff were understandably furious with Mike Dean's officiating for the opener.

An arguably offside Mustafi headed home from a Mesut Ozil free-kick, which came about after Davinson Sanchez appeared to tackle his Chilean namesake cleanly.

The Germany international still did well to convert the chance, and he has revealed how he teamed up with Ozil to carve Spurs' defence open.

What Mustafi told Ozil 

"The thing is, as I was going up [Mesut Ozil] was on the other side of the pitch and I said, 'Mesut, please. Go to the ball and bring it in'," he told Arsenal's official website, per Metro.

"I know his left foot and I know his deliveries and if you have players that can put the ball in like that, you go in with belief.

"That’s the most important thing when you go up for corners and free kicks, the belief that you can score and with the team that we have and the quality that we have, you go in and try to get your head on the ball."

When pressed on whether he was offside, the former Valencia man admitted:

"Well, I was only happy that they didn’t blow the whistle. It happened to me against Chelsea, so this time I’m lucky to get away with it. This is football, we always get things against us and things for us at the end of the year it is always a draw, you get good things and bad things."

That will come as little consolation to Pochettino, nor will the fact that Ozil chose the derby to produce his finest display of the season.

The playmaker is so often called out for failing to show up in the big games, but this just goes to show what a difference it makes when he and Sanchez put a shift in.

It's just a shame Arsenal are unlikely to be able to rely on the pair for much longer.

Should Arsenal's first goal have counted? Have your say in the comments.