Arsenal have the best defense in English premier league, Europe and in the world

[Kiap Cai Png Jin Ho Jiak]

Arsenal have the best defense in English premier league, Europe and in the world, but how come all their strikers cannot score goals under Mikel arteta.

[semen blow snow]

their play score from flanks and set pieces.
teams already know how to defend them. they already know arsenal can't score headers from open play