Each competitions have observed structure changes, with expansions in the quantity of taking part teams, introduction of new rounds, and changes in qualification standards through the years. The group stage was performed from September to December, although the knockout phase started in February, with matches normally played on Tuesday and https://beauahjii.losblogos.com/35493410/the-definitive-guide-to-what-are-the-uefa-champions-league-and-uefa-europa-league