Martin Guptill's continued domination of the Zimbabwe bowling steered New Zealand to a seven-wicket win with 19 balls to spare in the opening Twenty20 match at Eden Park Saturday.

Guptill's imperious 91 not out off 54 deliveries was the backbone of New Zealand's 160 for three, and along with Kane Williamson (48), they overtook Zimbabwe's 159 for eight in the 17th over.