Equally competitions have observed format modifications, with expansions in the number of taking part groups, introduction of recent rounds, and changes in qualification criteria over time. The group stage was played from September to December, whilst the knockout stage commenced in February, with matches ordinarily performed on Tuesday and Wednesday https://keo-nha-cai-599875.blogocial.com/about-what-are-the-uefa-champions-league-and-uefa-europa-league-72165017