IFFHS

The International Federation of Football History & Statistics (IFFHS) is an organisation that chronicles the history and records of association football. It was founded in 1984 by Alfredo Pöge in Leipzig. The IFFHS was based in Abu Dhabi for some time but, in 2010, relocated to Bonn, Germany, and then in 2014 to Zürich.

From its early stages to 2002, the IFFHS concentrated on publishing the quarterly magazines Fußball-Weltzeitschrift, Libero spezial deutsch and Libero international. When these had to be discontinued for reasons which were not officially told, the organisation published its material in a series of multi-lingual books in co-operation with sponsors. The statistical organisation has now confined its publishing activities to its website. IFFHS has no affiliation with FIFA, but FIFA has cited awards and records conducted by IFFHS on their website.

In 2008, Karl Lennartz, a sports historian and professor at the University of Cologne, Germany, called the organisation "obscure", describing it as a one-man show of its founder Alfredo Pöge. IFFHS rankings and their significance have been a matter of criticism and the largest German news agency, Deutsche Presse-Agentur, refuse to publish them. Furthermore, German die Tageszeitung stated that the IFFHS rankings serves merely for publicity, although Bild, Deutsche Welle, Kicker-Sportmagazin, German Football Association (DFB), and former president of the Association of West German Sports Journalists (German: Verbandes Westdeutscher Sportjournalisten — VWS) Heribert Faßbender have referenced IFFHS.

Since 1991, the entity has produced a monthly Club World Ranking.

The ranking takes into consideration the results of twelve months of continental and intercontinental competitions, national league matches (including play-offs) and the most important national cup (excluding points won before the round of 16).

All countries are rated at four levels based upon the national league performance—clubs in the highest level leagues receive 4 points for each match won, 2 for a draw and 0 for a defeat. Level 2 is assigned 3 pts. (win), 1.5 (draw) and 0 (lost), and so on with the next lower levels.

In continental competitions, all clubs receive the same number of points at all stages regardless of the performance level of their leagues. However, the UEFA Champions League and the Copa Libertadores yield more points than UEFA Europa League and Copa Sudamericana, respectively. The point assignment system is still lower for the AFC, CAF, CONCACAF and OFC continental tournaments. Competitions between two continents are evaluated depending upon their importance. Competitions not organised by a continental confederation, or any intercontinental events not recognized by FIFA, are not taken into consideration.

In 2009, the IFFHS released the results of a statistical study series which determined the best continental clubs of the 20th century. The ranking did not consider the performance of the teams in national football tournaments (except in the Oceania's club ranking due to limited editions held under OFC club competitions), the performance in the intercontinental or worldwide club competitions or those submitted in the IFFHS Club World Ranking, available since 1991.