Northland also won two from two, taking down some big names to sit at the top of their division after day one.
The Northland team, spearheaded by Luke Brown who played magnificently to record two wins and joined by Kadin Neho, Alex Neely, Taylor Gill and Sheldon Kearns, defeated an impressive Wellington team in the morning round on day one, and then backed it up in the afternoon to beat a solid Auckland outfit by an even better margin of 4-1.
Northland manager, Brad Bonnington was pleased with the first day but was measured in his assessment of the significance of being the early leader.
"You can't win it on day one, but you can certainly put yourself back in the pack."
The 2014 champions, Waikato have announced themselves yet again as a big threat with a clean sweep over Poverty Bay on day one.
Waikato's top two of Luke Twoomey and Nick Voke featured in dominant wins.
Joining Waikato, and fresh off a win at the SBS Invitational, Otago showed their most recent result was no fluke.
The experienced line-up made light work of Taranaki, claiming four of the five points on offer, continuing from where they left off two weeks ago.