Both of those competitions have observed format variations, with expansions in the quantity of participating groups, introduction of recent rounds, and adjustments in qualification conditions over time. The group phase was played from September to December, even though the knockout phase commenced in February, with matches ordinarily played on Tuesday https://xembngtrctipkonhci65294.targetblogs.com/36807580/the-greatest-guide-to-what-are-the-uefa-champions-league-and-uefa-europa-league