Rangataua, warming up to defend their Middlesex Sevens national club title at home this weekend, trailed 7-0 after a slick try to Masiu Vainikolo and struggled to get their hands on the ball early. But when they did, Alex Jessop flipped a magic ball for John Ririnui to score and Rangataua were soon leading 14-7 when Kemble Frost crashed over after a clever counterattack sparked by Daiyu Ishimori.
Right on halftime Whakarewarewa flyer Loni Fisiihoi sprinted 50m to score in the corner. The conversion missed, which ended up being the difference in the final outcome.
Rangataua went ahead 21-12 after Kanin Clancy scored the try of the match from a 65m run but Whakarewarewa closed the gap with a try to Liam Coleman. Jason Tamanui dotted down from close range to stretch Rangataua's lead to 28-19 before Fisiihoi's second try cut the deficit to just two points but Rangataua held on.
Earlier, Rangataua knocked out Te Puna 1 22-17 in the game of the tournament in one semifinal, while Whakarewarewa had too many guns in beating a well-performed Arataki team 17-5.
Rangataua coach Matua Parkinson says the tournament was beneficial for his team ahead of the Middlesex Sevens.
"We put as many of our sevens boys in there as possible with the heat and physicality of playing the game. It was good for the contact side of the game and we are happy with it."