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.
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.