Two Vital Players out for Dortmund vs Liverpool

Liverpool manager Jurgen Klopp will return home to face his former club Dortmund in the first leg of the Europa League quarter final on Thursday night.
The atmosphere is expected to be crazy and the fans can expect an exciting contest between the two teams.
Unfortunately, there are key injury concerns for both teams heading in the first leg of the tie. As far as Liverpool are concerned, star playmaker Roberto Firmino is not fit as yet and it will not come as a surprise if he does not play against the German side on Thursday.

On the other hand, two vital players are going to be absent for Dortmund as well. Experienced defender Neven Subotic is out (UEFA) for the remainder of the season (Thrombosis).
Moreover, versatile midfielder, Ilkay Gundogan is set to miss (Star) the first leg against the Anfield club due to a foot injury.
Who will come out on top?