We have to look at the opponent because Sevilla managed to win against Fenerbahce, even though they are a good club, when comparing Sevilla and Fenerbahce they are clearly very different and can be said to be equal or even better than Sevilla in terms of appearance and experience, although in this match they had to work hard.
On the other hand going back to Feyenoord it's going to be a bit difficult to predict because their opponents are sometimes very good and sometimes Mourinho does something terrible so it's going to be worth the wait.
Mourinho needs to do what he did well in the beginning, if Roma plays well in defense, then Feenord will have little chance. Mourinho loves the playoff stages and knows how to achieve good results in them, Roma are not the best team for this, but they can beat Feenord.
IMO, this match is quite even for the two teams that will fight, especially if we refer to the available odds. my guess, this fight will take place quite tough. because, in the first leg will be played at De Kuip, Feyenoord headquarters. Most likely, Mourinho will apply more defensive formation patterns. because, given that Feyenoord is not an easy opponent for them to overthrow. in fact, I suspect the home team has the chance to overthrow AS Roma in the first leg later. by the way, this is just my temporary conclusion.
Sevilla's game is also getting better, but I doubt that they will be able to play on equal terms with Manchester United, ten Hag raised the level of the team very well and proved it in matches with strong opponents.
This match will not be easy for Sevilla, considering their inconsistent performance this season. to the extent that, the chances they have are very slim to overthrow United. moreover, in the first leg of the match will be held at Old Trafford. even so, it does not mean that Sevilla does not have a chance. at least, they won't let The Red Devils move smoothly into the next phase. so, we'll see what these two trainers will implement in the match later.