Manchester United are in a slightly better condition so letting them play openly will give unexpected results and can beat Nottingham Forest.
Although Manchester United's squad is strong, the overall performance is better than Nottingham Forest. Nottingham Forest is strong this season. This team is capable of putting up a strong defense even against big teams. We have seen that Nottingham Forest players have performed very well in both matches against Liverpool. They won 7-0 against Brighton, shared points with Arsenal and a few days ago, Nottingham also won against Manchester City.
On the other hand, Manchester United's performance may be a little better on the Europa League platform, but Manchester United's performance in the Premier League is very irregular. So I don't want to make the mistake of betting on this team's victory. I will consider Nottingham Forest as the favorite in this match. This is Nottingham Forest's home match.
Just take a close look at both of these teams and their immediate head2head record this season, you will observe that they both have the capabilities to beat each other, so nothing should be ruled out, because in as much as Nottingham Forest are in a more better form than Manchester united, we all know that this Manchester united team mostly step up in bigger games, it's mostly against small opposition that Manchester united mostly struggle against, so I don't think that Nottingham forest can win Manchester united in this game, since they won Manchester united in the first leg 2-3, I am very confident that Manchester united will not lose this one again regardless of wether it's the home turf of Nottingham forest or not, so in my own prediction, I would be going with the option of Manchester united to win or draw or I would bet on them to play out a draw.