Exactly the same formation I am think will help Arsenal out in this match, th midfield will be a tough battle for Manchester United with only Casemiro left as the holding midfield. The other pairing partner will definitely be Erickson and he doesn’t have that energy left in him to compete with the likes of partey and Rice. But as we know or have seen Arteta is exploring the formation where Partey slides down to the right and Havertz filling the midfield position. Should Arteta use this line them Rashford will be a nuisance to Partey on the left flank and that will be a big problem for Arsenal to handle.
Also united going away to a top team has always ended in a bad result for them and it could be that such bad luck is still following them.
Erikson lacks the energy and strength for that midfied ever since that sudden heart failure of his, I don't rely tooo much on him but I sure know we'll of the great qualities and work rate he has whenever it comes to the midfied. His composed under pressure and had a good grasp of what it means to be a Manchester United player and also playing high transition football.
Mason Mount even of present haven't linked up rightly with the Manchester United midfielder's.
The combo of Declan Rice and Thomas Partey would do greatly offensively in midfied, they will also free up Odegaard to move and roam around opened spaces.
I'm more concerned about the attackers of Arsenal if they would get to convert those big chances. Caging Bruno Fernandez who is the source will be difficult but Arsenal has to achieve that so they could cut the chances and passes from Bruno Fernandez to these attacking players.