Barcelona, Napoli and Borussia Dortmund, of course, are good teams with a quality roster of players, but after Sevilla was eliminated from the Champions League, the favorite of this tournament is obvious to me, if you know what I mean. 
Sevilla are going to be a really big candidate for the Europa League title. We know their great history in this tournament. They had many titles in the last 10 years. And we see their performance in the La Liga now. They are doing a great job and chasing Real Madrid for the lead. I expect them to give a big importance to the Europa League also. So the other favourite teams should be aware of them also.