But they were forced to wait until the second half of their pre-season friendly against Sydney to see their new £52million signing in action.
It was all worth it however, as Arsenal supporters from around the world took to social media to revel in the moment.
There was a bit of confusion at first, or rather frustration, as the Frenchman was apparently placed on the wing with Olivier Giroud up front.
But supporters soon got over this little blip as he took to the pitch in Arsenal’s brand new black and pink third kit.
And settled into the game by making some great passes.
Oh, and by SCORING A GOAL.