2.90 for the favorite and 4.50 for the clear underdog is not much higher than other teams at all. If you look at the national championships, only Bayer is not in the top (although very close), and Sevilla is 13th in La Liga. Therefore, I believe that it is overrated - another thing is that so far they confirm that they are capable of something. And it seems to me that Juventus are now stronger than United simply because United are exhausted by the calendar - in the second game they simply did not have the strength to keep up the pace of the game. Therefore, I do not expect miracles in the game with Juventus.
I am also surprised at these quotes. The bookies apparently think that Leverkusen also has good chances to win the title. But somehow I also get it because we are in the semi-finals here, you can't reach that if you can't play football. Seville may have a different game in Europe than in the league, which explains why they perform so well. That victory over United also says something, you don't just brush it off the field 3-0 otherwise.
ya.ya.yo!
I think that if it was the Champions League then the odds would be something like 1.7 for Juventus (as it is now for City lol) and the rest would be considered as obvious outsiders to a greater or lesser extent. But this is the Europa League - a random league, so the bookmakers give some vague quotes where half-dead Sevilla is not far behind the favorite.