The semifinal form must be :
As roma
Leverkusen
Sevilla
And juventus
But things looks like in unexpected way. So it might be between feyenoord , leverkusen , manchester united and juventus , sepite sporting cp doing well away and then will play at home in the second leg , i still think juventus can handle it, as roma might be the one i doubt can get through.
I think you have to consider Manchester United even if they play away but sometimes they are unpredictable and have more experience
I still remember how Manchester United knocked Barcelona out that moment can be repeated in this match who knows.
my list Roma , Leverkusen , Man united and Juventus hope for the final Man united vs Juventus.