The Toffees suffered a damaging defeat at the Emirates Stadium as Gunners midfielder Aaron Ramsey netted a hattrick, while there were impressive performances from Pierre-Emerick Aubameyang and Henrikh Mkhitaryan.
"Overall, the two players integrated into our game well, and they look like they have played with us forever", the Frenchman said of Aubameyang and Mkhitaryan.
Mkhitaryan set up the Wales international's opener and also laid on Aubameyang, his old partner in crime at Borussia Dortmund, for a goal on his maiden Premier League appearance, although the offside flag should have ruled that one out.
"Everyone is trying to get as many points as they can and we need to keep looking up and putting points on the board for ourselves - and not get dragged back down into the bottom half".
"It is as exciting as a new signing".
Arsenal: Cech (Ospina, Min. 70), Bellerin, Monreal (Kolasinac, min. 45), Mustafi, Koscielny, Xhaka, Ramsey (Wilsher, Min. 75), Iwobi, Mkhitaryan, Özil and Aubameyang.
Today's game was a test for Mkhitaryan and he passed with flying colors, assisting three and helping out defensively.
Instead it was Everton who struggled defensively, particularly in the first half when their back three - which included new signing Eliaquim Mangala - was regularly exposed and caught out of position. In training already we can see how well they understand each other'.
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Yet Aubameyang wasn't at all bothered. He may be that secondary outlet that has been so desperately needed after Alexis's fall from grace and the growing over-dependence on Ozil. The Blues were under the cosh early and after the home side kept the ball following a blocked Mezut Ozil free kick, Henrick Mkhitarian fired a low cross into the six-yard box and Ramsey turned it past Jordan Pickford.
By no means did Koscielny steal the goal from Aubameyang but the new man certainly would have scored if not for the French defender beating him to the ball.