The two competitions have seen structure modifications, with expansions in the number of taking part teams, introduction of latest rounds, and changes in qualification conditions over time. The group stage was performed from September to December, although the knockout stage started in February, with matches commonly played on Tuesday and https://k-o-nh-c-i-531840.azzablog.com/36697055/an-unbiased-view-of-what-are-the-uefa-champions-league-and-uefa-europa-league