3. Resurgent Red Devils
United have had a drastic improvement in form since the dismissal of Erik ten Hag in late October. After the Dutchman finally got the boot, the Red Devils have won five of their seven games played, with two of those victories coming under new manager Ruben Amorim.
Despite not all displays under Amorim and ex-interim manager Ruud van Nistelrooy being overly convincing, United are showing signs of a resurgence.
The visitors can cause Arsenal some problems, so Arteta must ensure his side are weary of this. United have nicked the odd result against the Gunners over the last couple of years and could very well do so again on Wednesday, especially if the hosts are without the likes of Gabriel.