Both of those competitions have viewed format changes, with expansions in the number of taking part groups, introduction of new rounds, and changes in qualification standards through the years. The team stage was played from September to December, whilst the knockout stage started in February, with matches commonly performed on https://konhcitv05936.bloggazza.com/35393646/details-fiction-and-what-are-the-uefa-champions-league-and-uefa-europa-league