He received the ball with his back to goal, before smashing home his effort from the edge of the area. (caughtoffside.com)
Lacazette has welcomed his new teammate to north London, as seen in his Instagram post below, but ultimately more will be made of it given he's chosen an image of him appearing to slot home an effort in training with Aubameyang watching on in the background. (caughtoffside.com)
Meanwhile, Gary Cahill made it 3 - 1 shortly after as he smashed home an effort after the visitors failed to clear their lines, although Willy Caballero will feel as though he should have done better. (caughtoffside.com)