Arsenal is a much defensive unit than they have been for many a season, they have improved thanks to Gabriel coming in and defensive midfielder Partey, they have conceded the 2nd fewest number of goals this season in the Premier League. Arsenal knows that United struggle against teams that sit in a defend and I expect Arsenal to play in his manner and counter on a team that defensively have their own issues, however, the knock-on impact is that it should also help the under goals a line which feels a bit big at 2.75. United have not won this season in the league and that run could continue today against a fairly solid Arenal side.
