Two-time defending champions Auckland could yet make it a three-peat of titles after scraping through by the skin of their teeth to the HRV Cup semifinal.
Auckland needed to beat last-placed Central Districts at Eden Park yesterday to sneak through to Friday's playoff, and an unbeaten Lou Vincent half-century saw them do just that.
The Aces' victory eliminates Northern Districts and sets up a date with Wellington for a spot in Sunday's final.
Whichever team advances will have their work cut out for them in the deep south, with Otago heading into the showpiece on a run of nine straight wins.
Auckland, on the other hand, have only five victories to their name from the season, and their appearance in the playoffs seemed unlikely for much of the season.