Auckland have already picked up four first innings bonus points, and now face a decision whether to push on or declare early this morning.
Decisions will be more straight forward further north, where Northern Districts and Otago are locked in a tight battle after two days of their encounter in Whangarei.
ND were bowled out for 278, and initially had Otago under pressure at 104-4. A 138 run partnership for the fifth wicket between Derek De Boorder (89) and Anaru Kitchen (76) put Otago in control, but two wickets apiece to Scott Kuggeleijn and Daryl Mitchell put the contest back on level turns.
Mitchell's two scalps - both caught behind - were hotly contested by the Otago batsmen, with Kitchen and Sam Wells disagreeing with umpire Billy Bowden's decisions. Black Caps test wicketkeeper BJ Watling ended the day with four catches behind the stumps, including a sharp leg-side effort to dismiss opener Michael Rippon.
The final match of the round began today, with Wellington reaching 274-7 on day one after being inserted to bat by Canterbury.
Michael Papps (76) and Hamish Marshall's nice 69 led the way, with Scott Borthwick (47) and Tom Blundell (45) also chipping in.
Wellington looked set at 249-4, but Canterbury claimed some late scalps to keep themselves on level footing.
Matt Henry, recently released from the New Zealand ODI squad, was excellent with the ball for Canterbury, claiming 4-54.