Although Sevilla has not been very good this season in La Liga, failed in the Champions League, but I think they also have hope to reach a higher level. Manchester United are a good team but they are very likely to be beaten despite being the favorite of many. Sevilla are good in some ways, they are a good team but of course they have to try their best to find a good form in this match.
Manchester United also need to play perfectly to win against Sevilla, but when they underestimate Sevilla for whatever reason, then they must be prepared to fail. There is a possibility of surprises in the quarter-finals in my opinion, especially Sevilla vs Manchester United.
There are not any possibility about Sevilla for surprising in the quarter final against Manchester United, look on current performance in domestic league very poor and Sevilla have 2 points remaining from relegation zone. I think Sevilla will priority with La Liga than have magical on Europe League because stay and exist in La Liga for next season is most important thing.
But Sevilla have good experienced in Europe League, have won 6 tittles of Europe League and not guarantee will get success in this season looking on their focus have to play well in domestic league. Last games in La Liga Sevilla loss 2-0 from Getafe and seems their chance for surprising Manchester United not have possibility yet because United on top performance right now between domestic league and Europe League.
Manchester United are the favorites in that match even though Sevilla have come with a glorious historical record in the Europa League. I agree that the Red Devils shouldn't be too confident with the predictions of many people beating them. But from now on, Erik Tan Hag must instruct his troops to always train hard and seriously and respect whoever his opponent is.
But before looking at that match, Manchester United must first focus on the Premier League, of course Ten Hag is very careful in choosing a starting eleven. Because if an injury occurs while fighting in the domestic league it will be very detrimental to United when serving Sevilla. It was something like this that Ten Hag was really worried about.