Despite the conditions, there were some tough matches and unexpected results.
In Pool A, the favoured Tupapa Panthers and the opening Steinlager Sevens champions were surprisingly beaten 10-21 by Yalovata.
The James Tofilau and Sailosi Nagi-led Yalovata team came out firing in the first half, scoring three converted tries to lead 21-0 at the halftime break.
Panthers tried to fight back in the second spell but fell short of the win.
In Pool B, the game of the day saw the Barbarians score a last-minute, 60-metre try touched down by hard-working forward Seto Sefala as they beat the favoured Eels 12–10.
“Although this is only pool play, this will set up some interesting semi-final matches this Saturday again to be played at Tupapa Field from 2pm,” Cook Islands Rugby Union chief executive officer Ben Koteka said.
Meanwhile it was all square in the two under-19 clashes between Town and Country.
The Country won the first match 22-5 before Town claimed the second 12-5.
“Players that stood out in the U19s were Country winger Tomasi Bikaca and pivot Jermaine Pepe and for the U19 Town team utility player Samuel Taoro and halfback Callum Tamarua,” Koteka said.
Results: Panthers 10-21 Yalovata, Atiu 17-7 Eels, U19 Town 22-5 U19 Country, Panthers won by default over Vikings, Atiu 15-0 Barbarians, U19 Town 12-5 U19 Country, Yalovata (won by default over) Vikings, Eels 10-12 Barbarians