About UEFA Champions League (UCL, European Champion Clubs' Cup, European Cup)
The UEFA Champions League, a tournament which was back then called the European Cup, began in 1955 with 16 sides taking part. It changed into the Champions League in 1992 and has expanded over the years with a total of 79 clubs entering in 2019-2020.
Champions League is an annual club football competition organised by the Union of European Football Associations (UEFA) and contested by top-division European clubs, deciding the competition winners through a group and knockout format.
It is one of the most prestigious football tournaments in the world and the most prestigious club competition in European football, played by the national league champions of their national associations.
The group stage involves eight groups of four teams, with each club playing everyone else in that group home and away. The top two sides in each group move on to the round of 16 and the start of the knockout phase, while the third-placed team drops into the UEFA Europa League.The round of 16, quarter-finals and semi-finals are played over two legs, home and away, while the final is hosted by a stadium which is selected almost two years in advance.
The competition has been won by 22 clubs, 12 of which have won it more than once. Real Madrid is the most successful club in the tournament's history, having won it 13 times, including its first five seasons.
For more information about the UEFA Champions League you can visit their official website: uefa.com/uefachampionsleague/.