Qualification

 Since the second World Cup in 1934, qualifying tournaments have been held to thin the field for the final tournament.^[69] They are held within the six FIFA continental zones (Africa, Asia, North and Central America and Caribbean, South America, Oceania, and Europe), overseen by their respective confederations. For each tournament, FIFA decides the number of places awarded to each of the continental zones beforehand, generally based on the relative strength of the confederations' teams.

The qualification process can start as early as almost three years before the final tournament and last over a two-year period. The formats of the qualification tournaments differ between confederations. Usually, one or two places are awarded to winners of intercontinental play-offs. For example, the winner of the Oceanian zone and the fifth-placed team from the Asian zone entered a play-off for a spot in the 2010 World Cup.^[70] From the 1938 World Cup onwards, host nations receive automatic qualification to the final tournament. This right was also granted to the defending champions between 1938 and 2002, but was withdrawn from the 2006 FIFA World Cup onward, requiring the champions to qualify, as previous defending champions had uncompetitive performances at subsequent editions of the FIFA World Cup. Brazil, winners in 2002, were the first defending champions to play qualifying matches.^[71]