Both competitions have found format changes, with expansions in the volume of collaborating teams, introduction of latest rounds, and adjustments in qualification standards over the years. The group phase was performed from September to December, while the knockout phase commenced in February, with matches generally performed on Tuesday and Wednesday https://keonhacai83602.blogsvirals.com/35362097/facts-about-what-are-the-uefa-champions-league-and-uefa-europa-league-revealed