I think it is actually going to be 50-50. I don't think it is clear who the winner is going to be. The first leg was very interesting. Juventus had possession of 60%. They could not form coordinated attacks in my opinion. Sevilla took advantage of that. Outside that Juventus did not deserve to lose that match. It was actually good to see Juventus getting a draw that they actually deserved in my opinion.
I just do not see a clear winner in this match. I believe it is going to be evenly matched and very competitive between both of them.
Sevilla were under pressure at home to Juventus which affected the game and Juventus managed to dominate possession, but Sevilla also had several chances and they had five shots on target before Federico Gatti equalized in the second half of extra time. Meanwhile Juventus had difficulty creating chances because Sevilla's defense was much more consistent and even the attacks that Juventus tried to build in the first leg did not meet many targets so the opportunities were wasted.
While the second leg will take place at home to Sevilla, the 1-1 aggregate really helps Sevilla to get a good result at home, so that it can lead them to win the match and qualify for the final. Of course all possibilities can still happen, but I see Seville's chances are much bigger than Juventus.