The Ngongotahā Chiefs have been in hot form this season, but lose to Pacific on Saturday and their season is over.
Ngongotahā finished second in the round-robin, meaning they faced first-placed Mangakino in the first round of playoff matches last weekend.
A 26-18 loss means they now play Pacific, who finished third and beat Otumoetai last week, for a place in the grand final.
The sides have met twice this season. In round one Pacific were convincing 42-28 winners, but when they played again it was Ngongotahā who came out on top 34-30.
Ngongotahā coach Paul Nahu said his players knew what they needed to improve on from last week's loss to Mangakino and were excited about the challenge ahead.