Both competitions have witnessed format variations, with expansions in the number of taking part teams, introduction of latest rounds, and changes in qualification requirements over time. The team stage was performed from September to December, whilst the knockout phase began in February, with matches normally performed on Tuesday and Wednesday https://k-o-nh-c-i-8890009.bligblogging.com/37046009/what-are-the-uefa-champions-league-and-uefa-europa-league-no-further-a-mystery