The eight teams played each other in a round robin format.

For the 1975/76 tournament this was replaced with a round robin format.

It has been played in round robin format leading to a Final between the top two teams.

The field was expanded to 24 players, split into eight groups, playing in a round robin format.

Each team would then play in a round robin format.

The series is expanded from single elimination to round robin format.

The tournament will be held in a round robin format.

Unlike previous years, the tournament is played in a round robin format.

The 1956, 1957, and 1958 tournaments all had a round robin format.

Teams play each other twice, home and away, in a double round robin format.