The clash between Rotoiti and Greerton Marist beside Lake Rotoiti and Te Puna and Rangataua Sports at Te Puna are tough to predict with in-form, evenly matched sides.
Whakarewarewa are behind the others on points but have the easiest draw and should get maximum five points at home against Paroa.
The Te Puna v Rangataua Sports match at Maramatanga Park will be intense.
"Our approach into this weekend's game against Te Puna is a do-or-die one as we are yet to be guaranteed of our spot in the top eight," Rangataua coach Aramahou Ririnui said.
"The importance of this game is that we are going to treat it like a final, simply because if we don't win or get a bonus point, we will be relegated to Division One for the next round."
Te Puna coach Daniel Quate says Rangataua are definitely their biggest rivals in the competition.
"So regardless of the situation whether it's a pre-season game or a knock out game it's always a pretty brutal match.
"Our goal for the first round was to finish in the top four and we need to win on Saturday if that is to happen."
At the other end of the table Mount Maunganui are not yet crowned as first round winners but would need to lose at home to Opotiki to give second placed Tauranga Sports a chance.
In Division One, six clubs are still in contention to make the top four and move up to Premier Two next week, including Rangiuru and Judea.