Manchester united playing Galatasaray at Galatasaray's home in their next champions league fixture is definitely going to be another though one for Manchester united as that fixture is a determinant for Galatasaray and they will be playing form home against Manchester united.
Galatasaray would not want to give a chance to Manchester united on this one because if they loose they are definitely going to be affected with their chances to qualify, they have four points with Copenhagen which is at the second position on the table, if they win and Copenhagen loose to Bayern Munich they are definitely sure of qualifying but if they draw then Copenhagen will have to loose for them to be sure of qualifying so the best alternative for them is to win which they are definitely going to make to that in their home, currently it looks like Manchester united with their current form needs a miracle to qualify.
To be honest, I'm not holding my breath for Manchester United's game against Galatasaray. Based on what I've seen, United's play has not been encouraging, especially since Hojlund and Eriksen could be hurt. United's chances look even worse if they're out. It's going to be tough at Rams Park because Galatasaray is tough, especially when they're trying to stay in the Champions League. At this point, United might have to focus on making it to the Europa League because, let's face it, winning this game seems like a long shot.
I also think it would be better for Manchester United to qualify for the Europa League, but that still doesn't guarantee them success this season. They have the worst result in the group and now even Copenhagen have a better chance to stay in third place. As for the match against Galatasaray, I think Manchester United will lose.