Juventus is one of the favourites, but who is Sevilla? A team that is literally two points from the relegation zone (and this is not the Premier League but La Liga where competition in the basement is weak) has a chance of only two times worse than Juventus (top 2 in Serie A if you do not take into account the penalty). It seems to me that this is complete nonsense from bookmakers, even considering the fact that these are knockout games, everyone has a chance, etc.
I was checking for some information whether there were either Champions League or Europa League winners that struggled hard in the domestic league competition, but what I found
was this info about Manchester City in the season 1937/1938. Have a look at it, but as a quick summary, they won the Premier League title in the season before and then got relegated the season after
as the team which has scored the most goals!
I am quite sure that has never happened before or after.
But back to topic, I guess
this is the list you could be interested in and indeed there was no team so far that was really as bad as Sevilla at this point. They have all ranked pretty high, but sometimes they were ending the season miles and miles behind the title winner. Like Ac Milan in 2006/2007 with 36 points behind Inter and yet they won the Champions League final against Liverpool.
It's funny (and the situation with goals is generally mega absurd), but in those days a lot of things were strange, for example, the world champion Uruguay or Bitsan, who scored as many goals as Pele could not even dream of.
The case with Milan is interesting, but even if Milan had not won that Champions League, they would have a ticket to next year as they finished 4th in Serie A. Real Madrid won the Champions League in the 99-00 season, finishing only 5-th in La Liga, so it was the only way for them to get a ticket for next season and they used it.
But all this has little to do with Sevilla, which will definitely not show us any miracle and is in a much worse position than the discussed clubs.