Seeing the result from the first leg is more than enough to determine the result from the second leg. Juventus could not win against sevilla even when it was playing at home but what about when juventus will be playing away? That means if juventus faces very hard situation. Sevilla has always been winning with huge scores against its opponent at home. It will be another disaster for juventus to win against sevilla away.
Juventus hasn't impressive record when playing away with winning one games against SC Freiburg on 16th round, I don't sure with Juventus has chance will lead to final stage because Sevilla has consistency performance with playing home actually success eliminated Manchester United 3-0 on quarter final. But any possibility for Juventus with 50% chance because draw on first leg still has chance although have to play in the front of Sevilla fans.
On the one hand, Juventus failed to take advantage of their home game to win in the first leg and had to perform even better in the second leg away to Sevilla. It doesn't seem like an easy thing, especially since Juventus' away record is not very good in the European League competition.