Arsenal’s inability to take a point off them was key in them finishing second and Sunday saw them finally beat City in the league for the first time since 2015, building on their Community Shield shoot-out triumph against the treble winners.

The half-time introduction of Martinelli after three weeks out with a hamstring injury proved inspired, adding extra impetus to the attack before eventually hitting a late winner that deflected in off Nathan Ake to seal a 1-0 victory.

“We know how hard it is to play against them,” the Brazil international said. “It was a great performance from the team and a great win.

“Of course (it gives us more belief we can win this season’s title). We are Arsenal and we are always believing about the title.

“To win against a big side like them is great and we just need to carry on.

“A special day for me. I tried my best, really hard, to be back with the team and it was a great moment for me.

“It’s always good to win against the big teams and we did it today. I’m so happy.”

Arsenal remain unbeaten eight league matches into the season and are level in terms of points and goal difference with leaders Tottenham, with their bitter rivals only ahead on goals scored.

Sunday’s victory win was made all the more impressive by the fact Arsenal’s star man Bukayo Saka was missing, with a muscle injury ending his run of 87 successive Premier League appearances.

“We know our potential,” Martinelli said. “We know his potential and how important he is for us.

“Today we did our best, tried to win the game for our fans, for us and for B as well.”