Absolutely agree , betting in the goals category is the safest for this game as it could swing anywhere but we are sure going to expect a lot of goals, we don't really know if Manchester United's current form is a fluke or not and it makes the outcome of the game difficult to predict so i will stay on the fence and bet over 2,5 goals.
The book makers are also giving over 2.5 goals a benefit. They are assuming that the match has more chance to have over 2.5 goals than to have under. We certainly can to tell the outcome of who is going to win but it's easier to say that there will be scores.
I am gonna take Tottenham 's side