Each competitions have found format variations, with expansions in the quantity of participating teams, introduction of recent rounds, and adjustments in qualification standards over time. The group phase was played from September to December, although the knockout phase commenced in February, with matches usually performed on Tuesday and Wednesday evenings. https://k-o-nh-c-i-tv69022.blogscribble.com/36570958/little-known-facts-about-what-are-the-uefa-champions-league-and-uefa-europa-league