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.
It is a very important match for Galatasaray, they cannot afford to lose this match, but in my opinion, Galatasaray is not a very stable team. Even though UCL is looking good so far, I'm a little doubtful that they can win this match.
I remember the first match, Galatasaray had a very good win, but last week they lost to Hatayspor in the league. They had league defeats before that, and all of these give a clue to the match against Manchester United in the UCL. In this match, I will trust goalkeeper Muslera the most. If we make few mistakes, it will be a great reward for Galatasaray if they win this match and get out of the group.