Both of those competitions have observed structure adjustments, with expansions in the volume of participating groups, introduction of new rounds, and changes in qualification requirements over time. The team phase was performed from September to December, even though the knockout phase commenced in February, with matches commonly performed on Tuesday https://t-l-k-o-nh-c-i22085.blogmazing.com/35468668/a-simple-key-for-what-are-the-uefa-champions-league-and-uefa-europa-league-unveiled