The Kings of Oceania tournament begins in Auckland at the Trusts Stadium on July 30.
Twelve of New Zealand and Australia's top fighters will compete for a place at the Oceania World Grand Prix in Auckland next March.
The winner of that tournament will then be just one step away from a place in the World Grand Prix final to be held in Tokyo, Japan in November 2006.
There are two changes of fighters ahead of the tournament. Auckland's Jay Hepi replaces Andrew Peck while Invercargill's Hiriwa Te Rangi comes in for Peter Sampson.
The first K1 bout on Saturday sees Ron Sefo take on Sydney's Peter Graham with Hepi facing Ricardo Van Den Bos on second.
The other bouts see Daniel Tai facing Chris Chrisopoulides, Sydney Asiata against Paul Slowinski, Pola Mataele v Te Rangi and Jason Suttie taking on Matt Samoa.
The fighters have been placed in three pools and will compete in three fights with the winner of each pool then moving on to the Oceania World Grand Prix.
The winner of each pool will be decided by a points table with two points for the winner, none for the loser, with an extra bonus point available for a KO.
Each bout will last three rounds, with two extension rounds if needed to determine a winner.
In another change, Auckland K1 fans will get an extra chance to see their favourites as the second round of the Kings of Oceania tournament will now be at Trusts Stadium on October 8, with the final round in Queensland on December 10.
Peter Graham (Aus)
Jay Hepi (NZ)
Ron Sefo (NZ)
Ricardo Van Den Bos (Aus)
Jason Suttie (NZ)
Pola Mataele (NZ)
Daniel Tai (NZ)
Matt Samoa (Aus)
Paul Slowinski (Aus)
Hiriwa Te Rangi (NZ)
Sydney Asiata (NZ)
Chris Chrisopoulides (Aus)