The game's early stages followed a similar recent pattern of Tauranga starting slowly and Opotiki were 8-0 up after 10 minutes with a penalty then a smartly taken try by halfback Sam Howe. Tauranga finally settled into their traditional well-organised game plan and were ahead 14-8 with 10 minutes to play in the first half after tries to No8 Callum Armstrong and speedy winger Philip Togotogorua, who added another in the second spell.
Right on the break an unusual incident led to another Tauranga try and a commanding 21-8 lead that Opotiki never managed to haul in. First five Te Hata Wilbore dropped out from his 22 but overcooked the kick so much it was forced in the Tauranga in-goal area, which meant a scrum feed to Tauranga on the Opotiki 22. The ball was fed left and Gareth Brown, in his 101st game for Tauranga, scored with a diagonal run under the bar.
The main areas of concern for Tauranga team and supporters ahead of next week's final against Mount Maunganui will be to get more accurate with their lineout throwing and to ensure they take the points when available.
Morris has been the best goalkicker in the comp all season and his six conversions from six attempts - three from out wide - made the difference in the end and broke the club record for points in a season.
Morris has now scored 214 to go past Eruera Haimona's previous record of 209 points.
Tauranga won the round robin by 30 points and have just one game left to round off a memorable season.
However, Mount Maunganui is the one side with the firepower out wide to match them. Next Saturday's final should be a high-scoring, entertaining finale.
Tauranga Sports 42
(Philip Togotogorua 2, Callum Armstrong, Gareth Brown, Pingi Tala'apitaga, Nic Evemy tries; Morris 6 cons) Opotiki 20 (Te Amo Wilbore 2, Sam Howe tries; Te Hata Wilbore con, Te Amo Wilbore pen)