The UEFA Champions League, or simply known as the UCL is a football competition organized by UEFA, between some of the top club teams in Europe. The teams are selected because of good performances in their league matches. The teams used to have to win their countries' championship, but more than one team can play in the competition depending on how good their league is. For example: the Spanish League can get 4 Spanish clubs in the competition compared to the Kazakhstan League which can only get one team in the competition.