UEFA Europa League in the context of "Panathinaikos F.C."

Panathinaikos Football Club (Greek: ΠΑΕ Παναθηναϊκός Α.Ο. [panaθinaiˈkos] ), known as Panathinaikos, or by its full name, and the name of its parent sports club, Panathinaikos A.O. or PAO (Παναθηναϊκός Αθλητικός Όμιλος; Panathinaïkós Athlitikós Ómilos, lit. 'Pan-Athenian Athletic Club'), is a Greek professional football club based in Athens, Greece.

Panathinaikos was founded in 1908 as "Podosfairikos Omilos Athinon" (Football Club of Athens) by Giorgos Kalafatis. They play in Super League Greece, being one of the most successful clubs in Greek football and one of the three clubs which have never been relegated from the top division. Among their major titles are 20 Greek Championships, 20 Greek Cups, achieving eight times the Double and 3 Greek Super Cups. They are also one of three clubs to win a Greek championship undefeated, going without a loss in a top-flight campaign in the 1963–64 season. Panathinaikos is the only Greek team that has reached the UEFA Champions League final in 1971 (which they lost to Ajax 2–0), and also the semi-finals twice, in 1985 and 1996. It is also the only Greek team that has played for the Intercontinental Cup (1971). Furthermore, they have reached the quarter-finals of the Champions League on another two occasions (in 1992 and 2002), as well as the quarter-finals of the UEFA Cup twice (1988 and 2003). They have also won the Balkans Cup in 1977. According to research and polls, Panathinaikos is the second most popular football team in Greece. Panathinaikos is also a member of the European Club Association.

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.

Tottenham Hotspur Football Club, commonly referred to as simply Tottenham (/ˈtɒtənəm/, TOT-ən-əm, /tɒtnəm/, TOT-nəm) or Spurs, is a professional football club based in Tottenham, North London, England. The club itself has stated that it should always be called "Tottenham Hotspur" or "Spurs", as Tottenham is the area of London and not the name of the club. It competes in the Premier League, the top tier of English football. The team have played their home matches in the Tottenham Hotspur Stadium since 2019, replacing their former home of White Hart Lane, which had been demolished to make way for the new stadium on the same site.

Founded in 1882, Tottenham Hotspur's emblem is a cockerel standing upon a football, with the Latin motto Audere est Facere ("to dare is to do"). The team have traditionally worn white shirts and navy blue shorts as their home kit since the 1898–99 season. Their training ground is on Hotspur Way in Bulls Cross, Enfield. After its inception, Tottenham won the FA Cup for the first time in 1901, the only non-League club to do so since the formation of the Football League in 1888. Tottenham was the first club in the 20th century to achieve the League and FA Cup Double, winning both competitions in the 1960–61 season. After successfully defending the FA Cup in 1962, in 1963 they became the first British club to win a UEFA club competition – the European Cup Winners' Cup. They were also the inaugural winners of the UEFA Cup in 1972, becoming the first British club to win two different major European trophies. They collected at least one major trophy in each of the six decades from the 1950s to 2000s, an achievement matched only by Manchester United.

Manchester United Football Club, commonly referred to as Man United (often stylised as Man Utd) or simply United, is a professional football club based in Old Trafford, Greater Manchester, England. They compete in the Premier League, the top tier of English football. Nicknamed the Red Devils, they were founded as Newton Heath LYR Football Club in 1878, but changed their name to Manchester United in 1902. After a spell playing in Clayton, Manchester, the club moved to their current stadium, Old Trafford, in 1910.

Domestically, Manchester United have won a joint-record twenty top-flight league titles, thirteen FA Cups, six League Cups and a record twenty-one FA Community Shields. Additionally, in international football, they have won the European Cup/UEFA Champions League three times, and the UEFA Europa League, the UEFA Cup Winners' Cup, the UEFA Super Cup, the Intercontinental Cup and the FIFA Club World Cup once each. Appointed as manager in 1945, Matt Busby built a team with an average age of just 22 nicknamed the Busby Babes that won successive league titles in the 1950s and became the first English club to compete in the European Cup. Eight players were killed in the Munich air disaster, but Busby rebuilt the team around star players George Best, Denis Law and Bobby Charlton – known as the United Trinity. They won two more league titles before becoming the first English club to win the European Cup in 1968.

The Union of European Football Associations (UEFA /juːˈeɪfə/ yoo-AY-fə; French: Union des associations européennes de football; German: Union der europäischen Fußballverbände) is one of six continental bodies of governance in association football. It governs football, futsal and beach football in Europe and the transcontinental countries of Turkey, Azerbaijan, Georgia and Kazakhstan, as well as the West Asian countries of Cyprus, Armenia and Israel. UEFA consists of 55 national association members. Since 2022, due to the Russian invasion of Ukraine, FIFA and UEFA suspended all Russian national teams and clubs from any FIFA and UEFA competitions.UEFA consists of the national football associations of Europe, and runs national and club competitions including the European Championship, Nations League, Champions League, Europa League, Conference League, and Super Cup, and also controls the prize money, regulations, as well as media rights to those competitions.

Henri Delaunay acted as the first general secretary and Ebbe Schwartz as the first president. The current president is Aleksander Čeferin, a former Football Association of Slovenia president, who was elected as UEFA's seventh president at the 12th Extraordinary UEFA Congress in Athens in September 2016, and automatically became a vice-president of the world body FIFA.

Juventus Football Club (/juːˈvɛntəs/ yoo-VEN-təs; Italian: [juˈvɛntus]; from iuventūs, Latin for 'youth'), commonly known as Juventus or colloquially as Juve (Italian: [ˈjuːve]), is an Italian professional football club based in Turin, Piedmont, who compete in Serie A, the top tier of the Italian football league system. Founded in 1897 by a group of Turinese students, the club played in different grounds around the city, and has played in the Juventus Stadium since 2011.

Nicknamed la Vecchia Signora ("the Old Lady"), it has won 36 official league titles, 15 Coppa Italia trophies and nine Italian Super Cups, being the record holder for all these competitions; they also hold two Intercontinental Cups, two European Cup / UEFA Champions Leagues, one European Cup Winners' Cup, three UEFA Cups (Italian record), two UEFA Super Cups and one UEFA Intertoto Cup (Italian record). Consequently, the side leads the historical Federazione Italiana Giuoco Calcio (FIGC) classification, whilst on the international stage the club occupies the sixth position in Europe and the twelfth in the world for most confederation titles won with eleven trophies, as well as the fourth in the all-time Union of European Football Associations (UEFA) competitions ranking, having obtained the highest coefficient score during seven seasons since its introduction in 1979, the most for an Italian team in both cases and joint second overall in the last cited.

A treble in association football is achieved when a club team wins three trophies in a single season. A continental treble involves winning the club's top-level domestic league competition, main domestic cup competition, and main continental trophy. Although winning a second-tier continental trophy (e.g. Europa League) has also been described as a continental treble, it is not as widely accepted. A domestic treble involves winning three national competitions—including the league title, the primary cup competition, and one secondary competition, such as a league cup.

Competitions which consist of a single match or a two-leg match are not normally counted as part of a continental treble (e.g., the FA Community Shield, Supercopa de España, Supercoppa Italiana, Trophée des Champions, DFL-Supercup, UEFA Super Cup, Recopa Sudamericana, FIFA Club World Cup (2005–2023 editions), Intercontinental Cup and others).

Liverpool Football Club is a professional football club based in Liverpool, England. The club competes in the Premier League, the top tier of English football. Founded in 1892, the club joined the Football League the following year and has played its home games at Anfield since its formation. Liverpool is one of the most valuable and widely supported clubs in the world.

Domestically, the club has won a joint-record twenty league titles, eight FA Cups, a record ten League Cups and sixteen FA Community Shields. In international competitions, the club has won six European Cups, three UEFA Cups, four UEFA Super Cups—all English records—and one FIFA Club World Cup. Liverpool established itself as a major force in domestic football in the 1960s under Bill Shankly, before becoming perennial title challengers at home and abroad under Bob Paisley, Joe Fagan and Kenny Dalglish who led the club to a combined eleven league titles and four European Cups through the 1970s and 80s. Liverpool won two further European Cups in 2005 and 2019 under the management of Rafael Benítez and Jürgen Klopp, respectively; the latter led Liverpool to a nineteenth league title in 2020, the club's first during the Premier League era. Following Klopp's departure in 2024, Arne Slot guided Liverpool to a twentieth league title in 2025.

Olympique de Marseille (French: [ɔlɛ̃pik də maʁsɛj], locally [olɛ̃ˈpikə də maχˈsɛjə]; Occitan: Olimpic de Marselha, pronounced [ulimˈpi de maʀˈsejɔ]), also known simply as Marseille, or by the abbreviation OM (IPA: [o.ɛm], locally [oˈɛmə]), is a French professional football club based in Marseille which competes in Ligue 1, the top flight of French football. Founded in 1899, OM has won 26 domestic trophies: ten league titles, ten Coupe de France, three Coupe de la Ligue, and three Trophée des Champions. Continentally, the club holds a joint national record of one UEFA Champions League and a joint national record of one UEFA Intertoto Cup. Additionally, Marseille has played in three UEFA Europa League finals. In 1993, coach Raymond Goethals led the team to become the first French club to win the UEFA Champions League, defeating Milan 1–0 in the final, the first under the UEFA Champions League branding of the tournament. In 2010, Marseille won its first Ligue 1 title in 18 years under the management of former club captain Didier Deschamps.

Marseille's home ground is the 67,394-capacity Stade Vélodrome in the southern part of the city, where they have played since 1937. The stadium underwent renovations between 2011 and 2014, increasing its capacity to 67,000 in preparation for France's hosting of UEFA Euro 2016. The club has a large fan-base, having regularly averaged the highest attendance in French football. Marseille's average home gate for the 2018–19 season was 50,361, the highest in Ligue 1. The club have a long-standing rivalry with Paris Saint-Germain, against whom they contest Le Classique.