Arsenal Football Club (often simply known as Arsenal or The Arsenal, or by their nickname The Gunners) is an English professional football club based in Holloway, North London. Arsenal play in the Premier League and are one of the most successful clubs in English football, having won 13 First Division and Premier League titles and 10 FA Cups. They hold the record for the longest uninterrupted period in the English top flight and are the only side to have completed a Premier League season unbeaten.

Arsenal Football Club was founded in 1886 and, in 1893, became the first club from the south of England to join the Football League. They won their first major trophies—five League Championship titles and two FA Cups:—in the 1930s. After a lean period in the post-war years they became the second club of the 20th century to win the League and FA Cup Double, in the 1970–71 season, and in the 1990s and 2000s recorded a series of successes – during this time Arsenal won a Cup Double, two further League and FA Cup Doubles, and became the first London club to reach the UEFA Champions League Final.

Associazione Calcio Milan, commonly referred to as A.C. Milan and simply Milan in Italy, is an Italian professional football club based in Milan, Lombardy. The club was founded in 1899 by English lace-maker Herbert Kilpin, Alfred Edwards, and four other Englishmen and has spent most of its history in the top flight of Italian football, having spent only two years in Serie B in the 1980s.

The club has won 18 officially recognized UEFA and FIFA international titles, and remains tied with Boca Juniors as having won the most in the world. Milan has won four world titles, more than any other club in the world, having won the Intercontinental Cup three times and the FIFA Club World Cup once. Milan has won the European Cup on seven occasions; only Real Madrid has exceeded this total. The club has also won the European Super Cup a record five times and the Cup Winners' Cup twice.

Domestically, Milan has won 17 league titles, making the club the joint second most successful in Serie A. The club shares the position with local rivals, Internazionale, while Juventus holds the record for most league titles with 27 titles won. The club has also won the Coppa Italia five times, in addition to five Supercoppa Italiana triumphs. The UEFA Cup (Europa League) remains the only major competition for which the team are eligible to compete in that they have never won. Milan was a founding member of the G-14 group and the European Club Association that was formed following the first organization's dissolution.

Juventus Football Club, commonly referred to as Juventus and colloquially as Juve, is an Italian professional football club based in Turin, Piedmont. They were founded in 1897 and have spent their entire history, with the exception of the 2006–07 season, in the top flight First Division (called Serie A since 1929).

Juventus are historically the most successful team in Italian football and one of the most successful and recognized in the world. According to the International Federation of Football History and Statistics, an organization recognised by FIFA, Juventus were Italy's best club of the 20th century and the second most successful European club in the same period.

Overall, Juventus has won 51 official competitions, more than any other team in the country; 40 in the national First Division, which is also a record, and 11 in UEFA and world competitions. Juventus the third most successful club in Europe and the sixth in the world, with the most international titles officially recognised by one of the six continental football confederations and FIFA

Real Madrid Club de Fútbol - (Royal Madrid Football Club), commonly known as Real Madrid (and in Spain, in football circles, simply as el Madrid) is a professional association football club based in Madrid, Spain. It is the most successful team in Spanish football and was voted by FIFA as the most successful club of the 20th century, having won a record 31 La Liga titles, 17 Spanish Cups, a record nine European Cups and two UEFA Cups. Real Madrid was a founding member of FIFA and the now-defunct G–14 group of Europe's leading football clubs as well as its replacement, the European Club Association. The word "Real" in the club's name is the Spanish term for "Royal", and was added in 1920 together with the royal crown in the emblem.

Founded in 1902, Real Madrid has spent its entire history in the top flight of Spanish football. In the 1940s, the Santiago Bernabéu Stadium and the Ciudad Deportiva had to be rebuilt following the Spanish Civil War. The club established itself as a major force in both Spanish and European football during the 1950s. In the 1980s, the club had one of the best teams in Spain and Europe (known as La Quinta del Buitre), winning two UEFA Cups, five consecutive Spanish championships, one Spanish cup and three Spanish Super Cups.

Futbol Club Barcelona also known simply as Barcelona and familiarly as Barça is a football club based in Barcelona, Catalonia, Spain. The team was founded in 1899 by a group of Swiss, English and Spanish men led by Joan Gamper. The club has become a Catalan institution, hence the motto "Més que un club" (More than a club). The official Barça anthem is El Cant del Barça by Josep Maria Espinàs.

FC Barcelona is one of only three clubs never to have been relegated from La Liga and are the most successful club in Spanish football after Real Madrid, having won nineteen La Liga titles, a record twenty-five Spanish Cups, eight Spanish Super Cups, four Eva Duarte Cups and two League Cups. They are also one of the most successful clubs in European football having won fourteen official major trophies in total, including ten UEFA competitions. They have won three UEFA Champions League titles, a record four UEFA Cup Winners' Cups, a record three Inter-Cities Fairs Cups (the forerunner to the UEFA Europa League), three UEFA Super Cups and one FIFA Club World Cup. In 2009, Barcelona became the first club in Spain to win the treble of La Liga, Copa del Rey and Champions League. The club is also the only European side to have played continental football in every season since its inception in 1955. FC Barcelona became the first football team ever to win six out of six competitions in a single year thus completing the sextuple, comprising the 2008–09 La Liga, 2008–09 Copa del Rey, 2009 Supercopa de España, 2008–09 UEFA Champions League, 2009 UEFA Super Cup and 2009 FIFA Club World Cup.

FC Bayern Munich is a German sports club based in Munich, Bavaria. It is best known for its professional football team, which is the most successful club in German football, having won 22 German titles and 15 cups.

The club was founded in 1900 by eleven football players led by Franz John. Although Bayern won its first national championship in 1932, the club was not selected for the Bundesliga at its inception in 1963. In the middle of the 1970s, the club had its period of greatest success, when the famous team led by Franz Beckenbauer won the European Cup three times in a row (1974–76). In recent years they have been by far the most successful team in German football, winning seven of the last ten championships. The club's last international title was the Intercontinental Cup in 2001.

Chelsea Football Club are an English professional football club based in West London. Founded in 1905, they play in the Premier League and have spent most of their history in the top tier of English football. Chelsea have been English champions four times, FA Cup winners six times and League Cup winners four times. They have also been successful in Europe, winning the UEFA Cup Winners' Cup twice.

The club had their first major success in 1955, when they won the league championship. Chelsea won several cup competitions during the 1960s and 1970s, but after that did not win another major title until 1997. The past decade has been the most successful period in Chelsea’s history, capped by winning Premier League titles in 2005, 2006 and 2010, and reaching their first UEFA Champions League final in 2008.

Despite their name, the club are not based in Chelsea, but in neighbouring Fulham. The club's home is the 41,841 capacity Stamford Bridge football stadium in Fulham, where they have played since their establishment. In 2003, they were bought by Russian oil magnate Roman Abramovich.

Tottenham Hotspur Football Club, commonly referred to as Spurs, are an English professional football club based in Tottenham, North London, which currently plays in the Premier League. The club's home stadium is White Hart Lane.

Tottenham Hotspur were the first club in the 20th century to achieve the League and FA Cup Double, winning both competitions in the 1960–61 season. In 1963 they became the first British club to win a major European trophy — the European Cup Winners' Cup. In the 1970s, they won the League Cup on two occasions and were the inaugural winners of the UEFA Cup in 1972 (becoming the first British club to win two different major European trophies). In the 1980s, Spurs won several trophies: the FA Cup twice, FA Community Shield and the UEFA Cup 1983–84. In the 1990s, they won the FA Cup and the League Cup. In 2008 they won the League Cup once more, meaning that they have won a trophy in each of the last six decades — an achievement only matched by Manchester United.

The club's Latin motto is Audere est Facere (lit: "To Dare Is to Do"), and its emblem is a gamecock standing upon a football. The club has a long-standing rivalry with near neighbours Arsenal, and matches between the two teams are known as the North London derby.

Manchester United Football Club is an English professional football club who play at Old Trafford in Stretford, Greater Manchester. Having won a joint-record 18 league titles and a record 11 FA Cups, Manchester United is one of the most successful clubs in the history of English football, and are the reigning Football League Cup holders. The club is one of the wealthiest and most widely supported football teams in the world.

Founded as Newton Heath LYR F.C. in 1878, the club joined The Football League in 1892 and has played in the top division of English football since 1938, with the exception of the 1974–75 season. They were the first English club to win the European Cup, in 1968, and the Treble, in 1999; they added a third Champions League title in 2008.

Fußball-Club Gelsenkirchen-Schalke 04, commonly known as simply FC Schalke 04 or Schalke, is a German football club originally from the Schalke district of Gelsenkirchen, North Rhine-Westphalia. Schalke has long been one of the most popular football teams in Germany, even though major successes have been rare since the club's heyday in the 1930s and early 1940s. The football team is the biggest part of a larger sports club with more than 84,000 members (May 2010) making it the second largest sports club in Germany. Other activities offered by the club include basketball, handball, and track and field. Schalke 04 won its first major European trophy in 1997 by defeating Internazionale on penalty kicks for the UEFA Cup in Milan. Pope John Paul II became an honorary member of the club in 1987 after celebrating a mass in the Parkstadion. Schalke has a rivalry with Borussia Dortmund (see Revierderby) and also has a friendly relationship with Nuremberg. The mascot of the club is called Erwin (also Ährwin.)

Liverpool Football Club is a professional football club based in Liverpool, England which plays in the Premier League and is one of the most successful in the history of English football, winning more trophies than any other English club. Liverpool has won a joint-record eighteen league titles, seven FA Cups, seven League Cups, three UEFA Cups and five European Cups, an English record.

The club was founded in 1892 and won five league championships between 1900 and 1947. However, Liverpool spent several years in the Second Division during the late 1950s, and did not win promotion again until the appointment of Bill Shankly as manager in 1959. The club traditionally played in red and white, but this was changed to all red in the 1960s.

Under Shankly's management, Liverpool won three League Championship titles, two FA Cups and a UEFA Cup, the club's first European trophy. In the past 30 years, they have been one of the most successful clubs in English and European football; they won four European Cups between 1977 and 1984 and a fifth in 2005.

Football Club Internazionale Milano, commonly known as Internazionale or Inter is an Italian professional football club based in Milan, Italy. The club is also called Inter Milan by many non-Italians.

Wearing black and blue stripes, they have played in the Italian first division since 1908. The club have won twenty eight national trophies including eighteen Italian league titles, six Italian cups and four Italian Super Cup. Internationally, they won two back-to-back European Cups in 1964 and 1965, three UEFA Cups in 1991, 1994 and 1998 and two Intercontinental Cups in 1964 and 1965.

Olympique Lyonnais (commonly referred to as Olympique Lyon, Lyon, or simply OL, by English speakers and international press) is a French football club based in Lyon. They play in France's highest football division, Ligue 1.

The club was formed as Lyon Olympique Universitaire in 1899, according to many supporters and sport historians, but was nationally established as a club in 1950. Their most successful period has been the 21st century. The club won their first ever Ligue 1 championship in 2002, starting a national record-breaking streak of seven successive titles. Lyon have also won a record seven Trophée des Champions, four Coupe de France titles, and three Ligue 2 Championships. They have appeared in the UEFA Champions League eleven times and, during the 2009–10 season, reached the semi-finals of the competition for the first time after three previous quarter-final appearances.

Hamburger Sport-Verein is a German multi-sport club based in Hamburg, its largest branch being its football department. The football team is one of the country's oldest, most well known, and best performing clubs, with the unique distinction of having played continuously in top-flight German football since the end of World War I; the team has never been relegated from any top-flight league and is the only team that has always played in the 1. Bundesliga since its foundation in 1963.

In the mid-1970s, HSV began a brilliant run that saw them capture numerous honors. In 1976 they won the German Cup and followed up the next year with a Cup Winners' Cup. They took their first Bundesliga championship in 1979, fell just two points short behind Bayern Munich in 1980, and then won consecutive championships in 1982 and 1983, led by national star Felix Magath. 1983 also brought a European Champions' Cup with a 1–0 win over Juventus, followed by another German Cup in 1987.

Associazione Sportiva Roma, commonly referred to as simply Roma, is an Italian professional football club from Rome. Founded by a merger in 1927, Roma have participated in the top-tier of Italian football for all of their existence bar one season in the early 50s (1951-52). For their 58th season in a row (77th overall), Roma are competing in Serie A for 2009–10.

Roma have won Serie A three times, first in 1941–42 then in 1982–83 and again in 2000–01, as well as winning nine Coppa Italia titles and two Italian Super Cups. On the European stage Roma won an Inter-Cities Fairs Cup in 1960–61, coming close to European Cup/UEFA Champions League glory in 1983–84 (lost the one-legged final played at home against Liverpool after a penalty shootout), and finishing as runners-up in the UEFA Cup/UEFA Europa League for 1990–91 (two-legged aggregate defeat against Internazionale).