I am not surprised at all by Manchester United's defeat against Nottingham Forest. On the contrary, I bet on Nottingham Forest to win this match and I won my money.
I consider Nottingham Forest to be a strong team this season. Nottingham Forest has surprised us several times this season. Nottingham has won against strong teams like Liverpool, and even managed to get points against Chelsea. Nottingham has managed to get points against the two teams at the top of the table. So I expected Nottingham Forest to win against Manchester United. However, if Manchester United's defense was strong, Manchester United could have won this match.
The defeat occurred because Nottingham Forest played more optimally and Manchester United were busy building attacks but they forgot to defend. Nottingham Forest also cannot be ignored because they did beat a big team like Liverpool this season, but Manchester United's defeat should not have happened if their players could consistently maintain the defense area well because if you look at it, Manchester United's dominance is much better than Nottingham Forest.
Nottingham Forest players only had a few opportunities, but they managed to maximize them well and did not waste the opportunities that existed, that is why the coordination shown by Nottingham Forest players was much more successful in finding opportunities to score goals.