UEFA Champions League

The UEFA Champions League (UCL), usually known simply as the Champions League, is an annual club association football competition organised by the Union of European Football Associations (UEFA) that is contested by top-division European clubs. The competition begins with a round robin league phase to qualify for the double-legged knockout rounds, and a single-leg final. It is the most-watched club competition in the world and the third most-watched football competition overall, behind only the FIFA World Cup and the UEFA European Championship. 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 (and, for some nations, one or more runners-up) of their national associations.

Introduced in 1955 as the European Champion Clubs' Cup (French: Coupe des Clubs Champions Européens), and commonly known as the European Cup, it was initially a straight knockout tournament open only to the champions of Europe's domestic leagues, with its winner reckoned as the European club champion. The competition took on its current name in 1992, adding a round-robin group stage in 1991 and allowing multiple entrants from certain countries since the 1997–98 season. While only the winners of many of Europe's national leagues can enter the competition, the top 5 leagues by coefficient provide four teams each by default, with a possibility for additional spots based on performance during the previous season. Clubs that finish below the qualifying spots are eligible for the second-tier UEFA Europa League competition, and since 2021, for the third-tier UEFA Conference League.

In its present format, the Champions League begins in early July with three qualifying rounds and a play-off round, all played over two legs. The seven surviving teams enter the league phase, joining 29 teams qualified in advance. The 36 teams each play eight opponents, four home and four away. The 24 highest-ranked teams proceed to the knockout phase that culminates with the final match in late May or early June. The winner of the Champions League automatically qualifies for the following year's Champions League, the UEFA Super Cup, the FIFA Intercontinental Cup and the FIFA Club World Cup.

Spanish clubs have the most victories (20 wins), followed by England (15 wins), Italy (12 wins), Germany (8 wins), Netherlands (6 wins) and Portugal (4 wins). England has the most winning teams, with six clubs having won the title. The competition has been won by 24 clubs and 13 of them have won it more than once. Since the tournament changed name and structure in 1992, only two top-tier football clubs outside the Big Five European nations (Spain, England, Italy, Germany and France) have also reached the final: Porto (2003–04) and Ajax (1994–95 and 1995–96).

Real Madrid is the most successful club in the tournament's history, having won it 15 times. Madrid is the only club to have won it five times in a row (the first five editions). Only one club has won all of their matches in a single tournament en route to the tournament victory: Bayern Munich in the 2019–20 season. Paris Saint-Germain are the current European champions, having beaten Inter Milan 5–0 in the 2025 final for their first ever title.

The first time the champions of two European leagues met was in what was nicknamed the 1895 World Championship, when English champions Sunderland beat Scottish champions Heart of Midlothian 5–3. The first pan-European tournament was the Challenge Cup, a competition between clubs in the Austro-Hungarian Empire. Three years later, in 1900, the champions of Belgium, Netherlands and Switzerland, which were the only existing leagues in continental Europe at the time, participated in the Coupe Van der Straeten Ponthoz, thus being dubbed as the "club championship of the continent" by the local newspapers.

The Mitropa Cup, a competition modelled after the Challenge Cup, was created in 1927, an idea of Austrian Hugo Meisl, and played between Central European clubs. In 1930, the Coupe des Nations (lit. 'Nations Cup'), the first attempt to create a cup for national champion clubs of Europe, was played and organised by Swiss club Servette. Held in Geneva, it brought together ten champions from across the continent. The tournament was won by Újpest of Hungary. Latin European nations came together to form the Latin Cup in 1949.

After receiving reports from his journalists over the highly successful South American Championship of Champions of 1948, Gabriel Hanot, editor of L'Équipe, began proposing the creation of a continent-wide tournament. In interviews, Jacques Ferran (one of the founders of the European Champions Cup, together with Gabriel Hanot), said that the South American Championship of Champions was the inspiration for the European Champions Cup. After Stan Cullis declared Wolverhampton Wanderers "Champions of the World" following a successful run of friendlies in the 1950s, in particular a 3–2 friendly victory against Budapest Honvéd, Hanot finally managed to convince UEFA to put into practice such a tournament. It was conceived in Paris in 1955 as the European Champion Clubs' Cup.