The competition began in 1997-98 with 42 clubs from 26 countries, which expanded to 48 teams for the next two years. The tournament was played in seeded rounds of qualifying groups. There were three rounds of qualifying groups, with winners of qualifying groups progressing to the next round. The three winners of the third round groups entered the semifinals, along with the host club. The first round was held in September, the second in October, the third in November and the finals in December.