The two competitions have observed format changes, with expansions in the amount of taking part groups, introduction of latest rounds, and changes in qualification conditions over the years. The team stage was played from September to December, whilst the knockout stage commenced in February, with matches ordinarily performed on Tuesday https://ty-le-keo-nha-cai07395.fare-blog.com/36670004/the-best-side-of-what-are-the-uefa-champions-league-and-uefa-europa-league