I read something about this past performance of Manchester United, quite right Manchester had a very fantastic and excellent performance in the past but what will always think of is the current situation because the current performance determines the position of the team. I don't think head to head matter in this situation, all those are past and that wasn't a most for Manchester United to win Nottingham Forest any time the meet. Currently Nottingham Forest are extremely good beyond what we thought of them. Manchester United last meeting against Nottingham Forest was a defeat at their own home, this time around the will be hosted by Nottingham Forest and many are still doubting the victory of Nottingham Forest forgetting what they have done in the first leg. Meanwhile everyone have a son opinion on how they view things.
The difference between the past and the current day is the confidence. Not just theirs neither, their opponents as well. Back in the day when United played against anyone, and I mean anyone, English or European, they had the belief that they can beat everyone, doesn't mean they always did, we have seen them lose many times, they went out there with the hope that they can win any game.
Nowadays, even a smaller team could have hopes to beat United, and United has no hope in them, they do not have confidence to beat any team. When other teams played against United back in the day, they were always scared, they knew United was a great team, but when someone plays against them now, they just know United sucks and they can beat United.