sports
Which team has gone furthest in Europe while being relegated in the same season?
Plus: teams who went out of Europe without losing a game, and rare competitive meetings

TL;DR
- Several teams have reached advanced stages in European competitions while being relegated in the same season, including Celta Vigo, Perugia, and Juventus.
- Villarreal in 2011-12 and Blackburn Rovers in 1998-99 are other examples of teams relegated in seasons they played in European tournaments.
- Historically, before 1992, a significant number of quarter-finalists also suffered relegation in the same season.
- Teams like Viktoria Plzen, Feyenoord, Espanyol, and Manchester City have been eliminated from European competitions without losing a game.
- Espanyol holds the record for the longest unbeaten run (15 games) in the UEFA Cup before being eliminated in the final on penalties.
- Benfica also experienced an unbeaten run in the Europa League, ultimately losing in the final on penalties.
- The article also touches upon records for the longest gaps between competitive fixtures for the same teams.
- Questions are posed regarding the most appearances and wins against a single club in one season, and clubs with the highest ratio of European titles to league titles.