Equally competitions have viewed structure changes, with expansions in the quantity of taking part groups, introduction of latest rounds, and adjustments in qualification criteria over time. The group stage was played from September to December, while the knockout stage began in February, with matches usually performed on Tuesday and Wednesday https://lorenzosndui.blogofchange.com/37137945/the-ultimate-guide-to-what-are-the-uefa-champions-league-and-uefa-europa-league