I doubt that Manchester United can win this match. although their performance has improved a bit in the last few matches, it is not to the point where they can win against Arsenal who just returned from beating PSV 7-0.
In the last 5 matches against Arsenal, Manchester United also did not get good results, with 4 losses and 1 win on penalties, this is not a good record. and added to their performance which is still mediocre, I can see Manchester United being embarrassed by Arsenal at their home ground on Sunday.
Fully doubt with Manchester United opportunity for defeating Arsenal at upcoming premier league match in this week, Arsenal on confidence performance after success defeating PSV over 7-0 at Champion League match and other match Manchester United just getting draw from Real Sociedad at UEFA Europe League match. Comparison current standing, Manchester United have many points left from Arsenal who settled at 2nd place and have possibility for winning Premier League tittle in this season.
In last five matches all competition, Manchester United won only one match and got draw 3 matches become bad result for Ruben Amorim since appointing become manager. For this season I doubt will Manchester United reach the higher standings until the top fourth position behind have 11 matches left or only fight out from relegation standings zone.