#2 Play a high line of defence with effective offside traps
If Pogba gets space, his first thought is to play a killer air or through ball to his wingers. Emery prefers a high line but their offside traps have been just above average. While playing against a quick-attacking side like Manchester United, Emery and co will have to prepare pretty well to cope up with it.
If Arsenal plays with a low line of defence, it will hinder their attacking abilities resulting in no goals. Therefore, they must stick to their style.
Rashford and Martial can easily outrun the Arsenal defenders, but proper offside traps and perfect anticipation can do the job for Emery's men. I think Unai will go with the same 4-4-2 formation with Kolasinac, Koscienly, Sokratis and Ainsley Maitland-Niles as a back four.
Arsenal showed real determination while defending counter-attacks as well as build-ups against Chelsea, and they must be much more organised against a well-attacking side like Manchester United.