A late try by tighthead prop Chris Preddy gave Zingari-Richmond an upset 29-26 win over Green Island at Montecillo.
The game was played at a hectic pace and Zingari made the most of its chances to score three tries.
It had the dominant scrum, in which Preddy played a key role, while towering lock Tom Rowe dominated the lineout.
Flanker Brady Carmichael was a strong defender and upset many promising Green Island attacks.
First five-eighth Christian Walker directed play and Fumiaki Tanaka was a lively halfback.
The Green Island backs attacked from all parts of the paddock. Centre Roma Saulieoge was lively and fullback Devin Stapley was dangerous on the counter-attack.
Loose forwards Junior Sala and Jackson Hemopo were the best Green Island forwards.
Green Island should have won the game but it blew its chances with dropped passes and by taking too many wrong options.
Zingari-Richmond 29 (Christian Walker, Brady Carmichael, Jeremy Bekhuis, Andrew Melville, Jack Facer tries; Walker 2 con), Green Island 26 (Roma Saulieoge, Dean Moeahu, Andre Clarke tries; Joe Bartlett con, 3 pen). Halftime: Green Island 15-12.