The tournament featured four rounds. For each edition the FIH decides the number of events and teams for each round. The number of Round 1 events varied in each cycle depending on the number of participating national teams. Teams were grouped regionally, although European teams were split in several tournaments. The remaining rounds have teams selected with no regional restrictions. The top teams received a bye to a Round 2 or Semifinal event depending on the FIH World Rankings at the time of seeking entries, number which also varied depending on the edition.[2]