After A.S. Roma won against Club Brugge KV in Belgium in 2006, fans of the former team began to use the riff as a chant, having learned it from the latter. Fans of the Italy national football team proceeded to chant the riff at games leading up to the 2006 FIFA World Cup, and "Seven Nation Army"—known as the "po po po po po" song among Italians—became the team's "unofficial theme". After Italy won the 2006 FIFA World Cup Final, the riff was sung in Rome's streets. Regarding the song's popularity in Italy, Jack White said: