I don't think that Manchester United will be capable of defeating Arsenal with many goals, and I can't even say that Manchester United has more chances of winning the game. All I know is that the match will not be easy for each team, so I expect the match to be tough,but I don't know which statistics were used and included that Manchester United will defeat Arsenal with many goals. Currently, both Manchester United and Arsenal are not doing well, and for everyone who has been watching their matches as this season starts, we understand they are both not in good shape. And if you check their head-to-head statistics, Manchester United have not been able to beat Arsenal in Arsenal home game over the past few seasons, so I wonder why you predicted Manchester United would beat Arsenal.

Yes, I believe that Nottingham Forest was lucky and that is why they score. Sometimes it is not about the team that have high ball possessions always win some time it depends about the chances you make and utilize it, in Nottingham Forest few matches have match they hardly win possession but they always score because they alway make use of their attacks despite that is not all they will score. Assuming Chelsea make uses of their attack Chelsea should also score and even win the match.