Treble (association football) in the context of "Intercontinental Cup (1960–2004)"

Lionel Andrés "Leo" Messi (Spanish: [ljoˈnel anˈdɾes ˈmesi] ; born 24 June 1987) is an Argentine professional footballer who plays as a forward for and captains both Major League Soccer club Inter Miami and the Argentina national team. Widely regarded as one of the greatest players in history, Messi has set numerous records for individual accolades won throughout his professional footballing career, including eight Ballon d'Ors, six European Golden Shoes, and eight times being named the world's best player by FIFA. In 2025, he was named the All Time Men's World Best Player by the IFFHS. He is the most decorated player in the history of professional football having won 45 team trophies. Messi's records include most goals in a calendar year (91), most goals for a single club (672 for Barcelona), most goals in La Liga (474), most assists in international football (61), most goal contributions in the FIFA World Cup (21), and most goal contributions in the Copa América (32). A prolific goalscorer and creative playmaker, Messi has scored over 890 senior career goals and provided over 400 assists for club and country—the most of any player—resulting in over 1,300 goal contributions, the highest total in the sport's history.

Messi made his competitive debut for Barcelona at age 17 in October 2004. He gradually established himself as an integral player for the club, and during his first uninterrupted season at age 22 in 2008–09 he helped Barcelona achieve the first treble in Spanish football. This resulted in Messi winning the first of four consecutive Ballon d'Ors, and by the 2011–12 season he set the European record for most goals in a season and established himself as Barcelona's all-time top scorer. During the 2014–15 campaign, where he became the all-time top scorer in La Liga, he led Barcelona to a historic second treble, leading to a fifth Ballon d'Or in 2015. He assumed Barcelona's captaincy in 2018 and won a record sixth Ballon d'Or in 2019. At Barcelona, Messi won a club-record 34 trophies, including ten La Liga titles and four Champions Leagues, among others. Financial difficulties at Barcelona led to Messi signing with French club Paris Saint-Germain in August 2021, where he won the Ligue 1 title during both of his seasons there. He joined MLS club Inter Miami in July 2023.

Paris Saint-Germain Football Club, commonly referred to as Paris Saint-Germain (French: [paʁi sɛ̃ʒɛʁmɛ̃]) or simply PSG, Paris or Paris SG, are a French professional football club based in Paris. Founded in 1970, following the merger of Paris FC and Stade Saint-Germain, they compete in Ligue 1, the top division of French football. PSG play their home matches in the 47,929-capacity Parc des Princes in Paris. With 55 trophies won, they are the most decorated club in France. PSG are the most popular football club in France and one of the most widely supported teams in the world. The team has a longstanding rivalry with Marseille, against whom they contest Le Classique.

The Parisians won their first major title, the Coupe de France, in 1982 and their first Ligue 1 title in 1986. The 1990s were one of the most successful periods in the club's history, with their second league title in 1994 and their first European trophy, the UEFA Cup Winners' Cup in 1996. After a decline in fortunes during the 2000s, a recovery began in the 2010s when they were acquired by Qatar Sports Investments. With significant investment, PSG won multiple league titles and national cups, becoming a regular in the UEFA Champions League. They won their first Champions League in 2025 as part of a continental treble.

Amsterdamsche Football Club Ajax (Dutch: [ˈaːjɑks]), also known as AFC Ajax, Ajax Amsterdam, or commonly Ajax, is a Dutch professional football club based in Amsterdam, that plays in the Eredivisie, the top tier in Dutch football. Historically, Ajax (named after the legendary Greek hero) is the most successful club in the Netherlands, with 36 Eredivisie titles and 20 KNVB Cups. It has continuously played in the Eredivisie since the league's inception in 1956, and along with Feyenoord and PSV Eindhoven, it is one of the country's "big three" clubs.

Ajax was one of the most successful clubs in the world in the 20th century. According to the International Federation of Football History & Statistics, Ajax was the seventh-most successful European club of the 20th century and The World's Club Team of the Year in 1992. According to German magazine Kicker, Ajax was the second-most successful European club of the 20th century. The club is one of five teams that have earned the right to keep the European Cup and to wear a multiple-winner badge. In 1972, they completed the continental treble by winning the Eredivisie, KNVB Cup, and the European Cup. They also won the first (albeit unofficial) European Super Cup against Rangers in January 1973. Ajax's most recent international trophies are the 1995 Intercontinental Cup, 1995 UEFA Super Cup and the 1995 Champions League, where they defeated Milan in the final; they lost the 1996 Champions League final on penalties to Juventus. In 1995, Ajax was crowned as World Team of the Year by World Soccer magazine.

Manchester City and Manchester United are popular Premier League football clubs in Greater Manchester. United's ground is in Old Trafford; Manchester City's home ground is the City of Manchester Stadium in east Manchester. Fixtures between the clubs are referred to as the Manchester Derby.

Manchester United are historically the second most successful football club in England with 67 elite honours won (including three European Cups) and was the first team in England to achieve the Continental treble. Manchester United's revenue was the fifth highest of a football club in the world in the 2022–23 season at €745.8 million. In 2023, Forbes estimated the club was the second most valuable in the world at $6 billion.

In 2008–09, FC Barcelona started a new era with a new manager, former captain and Barcelona B coach Pep Guardiola, who led the team to the first treble in Spanish football history. After selling off high-profiled players such as Deco and Ronaldinho, Barcelona played scintillating football throughout the season, winning the Copa del Rey, La Liga, and the UEFA Champions League. This team is widely regarded as one of the greatest teams in football history.

The 2014–15 season was Futbol Club Barcelona's 116th in existence and the club's 84th consecutive season in the top flight of Spanish football. This was the first of the three seasons under head coach Luis Enrique.

The season was one of the most successful ones in the club's history, as Barcelona clinched its second continental treble after winning La Liga, the Copa del Rey and the UEFA Champions League. The league title was won in a closely fought title race with Real Madrid, while the Copa victory was achieved with a brilliant 3–1 victory over Athletic Bilbao at Camp Nou in the final. In the Champions League, Barcelona overcame Bayern Munich (3–0 home, 2–3 away) to set up the final against Juventus in Berlin, where Barça triumphed 3–1. Barcelona's success may be in large part attributed to their formidable attacking trio composed of Lionel Messi, Neymar, and summer signing Luis Suárez, who scored a record 122 goals in all competitions to become the trio with most goals in a single season in Spanish football history.

The 2025 UEFA Champions League final was the final match of the 2024–25 UEFA Champions League, the 70th season of Europe's premier club football tournament organised by UEFA, and the 33rd season since it was renamed from the European Champion Clubs' Cup to the UEFA Champions League. It was held at the Allianz Arena in Munich, Germany, on 31 May 2025, between French club Paris Saint-Germain and Italian club Inter Milan.

Paris Saint-Germain won the match 5–0 for their first European Cup title, marking the second final victory by a French club since Marseille in 1993. Their margin of victory was the largest in any of the main European men's club competitions final, with their goal tally only surpassed in one European Cup final by Real Madrid's seven in 1960. In doing so, Paris Saint-Germain completed a continental treble, the first of a French club, while Luis Enrique became the second manager since Pep Guardiola to have won the treble twice. As winners, Paris Saint-Germain earned the right to play against Tottenham Hotspur, winners of the 2024–25 UEFA Europa League, in the 2025 UEFA Super Cup, and automatically qualified for the 2025 FIFA Intercontinental Cup final and the 2029 FIFA Club World Cup. The match would also be Simone Inzaghi's final match as manager of Inter Milan as he would leave his post three days after the final by mutual consent.

Mario Mandžukić (Croatian pronunciation: [mâːrio mǎndʒukitɕ]; born 21 May 1986) is a Croatian football coach and a former player who was most recently an assistant coach for the Croatia national team. As a player, he played as a forward and became known for his aggressiveness, defensive contribution, and aerial prowess.

Starting his career in 2004 at hometown club Marsonia, Mandžukić then moved to two Zagreb-based clubs: NK Zagreb in 2005 and Dinamo Zagreb in 2007. He was Croatian First League top goalscorer in the 2008–09 season. After joining VfL Wolfsburg in 2010, Mandžukić moved to fellow-Bundesliga side Bayern Munich in 2012. He helped Bayern win their first continental treble (Bundesliga, DFB-Pokal, Champions League) in his first season, and became the first Croatian to score in a Champions League final. After winning a domestic double the following season, he left Bayern for La Liga club Atlético Madrid in 2014, and a season later was signed by Juventus in the Serie A. Mandžukić won four league titles and three Coppa Italia titles with Juventus, and reached the 2017 Champions League final. He left Juventus in December 2019 for Qatari side Al-Duhail and returned Italy in January 2021, signing with AC Milan. He retired in September of the same year.