Due to Covid-related travel restrictions in 2021, Argentina, Australia, Fiji, France, Japan, New Zealand and Samoa were unable to compete.

All teams participating in the Series receive competition points according to their ranking at the end of each tournament. The overall winner is determined by the team with the most points, as set out in the table below, which is altered for 2021 due to the reduced number of teams.

Men's Series Point System (2021)
Rank Points
1 20
2 18
3 16
4 14
5 12
6 10
7 8
8 6
9 4
10 3
11 2
12 1