A.C. Milan in the context of San Siro

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.

The 2005 FIFA Club World Championship final was an association football match played between São Paulo of Brazil, the CONMEBOL club champions, and Liverpool of England, the UEFA club champions, on 18 December 2005 at the International Stadium Yokohama, Japan. It was the final match of the 2005 FIFA Club World Championship, a competition for the winners of the primary cup competitions of FIFA's continental members. The Club World Championship replaced the Intercontinental Cup, which both teams had competed in before. São Paulo had won the Intercontinental Cup twice in 1992 and 1993, while Liverpool had lost twice in 1981 and 1984.

The teams qualified for the championship by winning their continent's primary cup competition. São Paulo won the 2005 Copa Libertadores, defeating Brazilian team Atlético Paranaense 5–1. Liverpool won the 2004–05 UEFA Champions League, defeating Italian team Milan 3–2 in a penalty shootout after the match had finished 3–3. Both teams played one match in the championship en route to the final. São Paulo beat 2005 AFC Champions League winners Al-Ittihad 3–2, while Liverpool beat 2005 CONCACAF Champions' Cup winners Deportivo Saprissa 3–0.

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.

The 1969 Intercontinental Cup was a two-legged association football match contested between 1968–69 European Cup champions Milan and 1969 Copa Libertadores winners Estudiantes de La Plata. It was the 10th edition of the competition.

The first leg was played at the San Siro in Milan, on 8 October 1969. Milan won the home game 3–0. The return leg was held on 22 October, at La Bombonera in Buenos Aires. Despite suffering a 2–1 defeat, Milan won the title on aggregate.