New Zealand got the start they craved, then South Africa took the contest away from them, finishing on 281 for five.
Trent Boult, swinging the ball beautifully, snaffled two wickets, Hashim Amla and Quinton de Kock, inside the first eight overs, which was followed by a fine stifling operation by a blend of Tim Southee, Boult and new man Matt Henry, who did an outstanding job.
He squeezed Faf du Plessis, beat him with one beauty and his first five-over spell cost only nine. In addition, he earned that rarest of beasts, the crowd chanting his name.
Four days ago he was playing for Canterbury in the Plunket Shield. The decision to choose him over original squad picks Kyle Mills and Mitchell McClenaghan was immediately justified.
However, captain AB de Villiers isn't rated the game's best ODI batsman for nothing. His arrival, after Rilee Rossouw had gone to a splendid one-handed catch by Martin Guptill at backward point, put the oomph into South Africa's innings.