Because Juventus were really bad in the first half and the second half wasn't very good either. They wasted so many chances at the same time. Sevilla would surely like to control the game in Spain to finish the job. I think they will do a pretty good job about that.
For all those who have followed Sevilla in recent years, this result is no surprise.
Although Sevilla doesn't play well in the Spanish championship, they are the absolute record holders in terms of the number of trophies won in the European league.
In total, they won as many as 6 trophies in this competition, in the period 2014-2016 they won this competition three times in a row and are the most successful European club in this competition.
Given this tradition, I was sure that Sevilla would be a very difficult opponent for Juve and that's what happened, Juve luckily avoided defeat in the last minute.
I think that Sevilla has a better chance of reaching the finals, but we will see a very uncertain and open match in return.