Kerr's purple patch, Devine's four-for sink South Africa

New Zealand extended their winning streak with a commanding 80-run win over South Africa in their Women's T20I series opener in Mount Maunganui.

Facing each other for the first time since the 2024 World Cup final, New Zealand's win was headlined by Amelia Kerr, just like the title-winning game in Dubai two years ago. Later, Sophie Devine starred with the ball, her figures of 4-12 being the best of her 20-year T20I career.

Fresh off a clean sweep over Zimbabwe, the hosts' top order continued much of their good work, even though the in-form Isabella Gaze was run out without facing a ball.

Kerr made the most of her purple catch, bringing up her seventh consecutive 40+ score in T20Is, combining with No.3 Georgia Plimmer, who came back from injury after missing out on the Zimbabwe ODIs.

It was Plimmer's first T20I fifty since the one against Sri Lanka in the T20 World Cup a couple of years ago. She hit three sixes, one of which took her past the landmark, teasing two fielders on the leg-side fence. Two balls later, she repeated the shot in the same region to a more convincing effect.

That over, from Chloe Tryon, gave them 19 runs. Placed at 142/1 after 13 overs, they looked well set for a 200+ total.

Kerr's batting was made up of her usual 360-degree brilliance: using the depth of the crease, shuffling around, attacking on all sides of the wicket, including scoops behind the keeper.

She fell to Masabata Klaas in the 14th over, eyeing a leg-side swipe, but ending up ballooning a catch behind the keeper.

Klaas, in fact, was South Africa's silver lining, finishing with 2-15 when everyone else went over eight an over. After the game, captain Laura Wolvaardt praised the new-ball bowler, attributing her success to "enjoying the game," while everyone else was "a bit reactive."

Most of New Zealand's middle order perished trying to force the big shots, with South Africa holding them back a bit and restricting them to 190.

South Africa could never really get going in their response. Jess Kerr was tight with her channels, giving away little. Trying to force her way out of a sluggish start, Sune Luus was the first one to fall, caught brilliantly by a diving Suzie Bates at cover.

Two balls later, Wolvaardt also walked back, dismissed for a T20I duck for the first time in 40 innings.

The double-strike punched the life out of South Africa's innings, and the rest of it was spent playing catch-up to a rapidly rising run-rate. Amelia Kerr could have had Tazmin Brits in the first over, but Bates couldn't hold on to an overhead effort right after the Powerplay.

The reprieve did little to help the scoring; by the end of the 10th over, the required run-rate had shot up to nearly 15 an over.

Sophie Devine's canny pace change-ups made it difficult for the SA batters to force the scoring rate. Chloe Tryon fell in the 12th over, holing out to mid-on. Three overs later, Brits fell to Devine as well, failing to clear the in-field.

From there on, South Africa could only reduce the margin of defeat. Nadine de Klerk looked to access the leg-side field, using the pace behind square instead of trying to hit against it. She was Devine's third victim, attempting a ramp but only directing the ball onto her own stumps. Kayla Reyneke brought up a couple of boundaries behind square, but it was just about enough to take South Africa past 100.

In the final over, Bates had a minor injury scare, rolling on her neck - and presumably her GPS device - while attempting a catch, but she was okay to continue.

Post-game, Wolvaardt admitted the team had been "outplayed in all aspects of the game," saying her team had "mis-executed their plans."

On the other hand, Player of the Match Amelia Kerr praised the intent shown, appreciating the slower balls and yorkers towards the end, as well as the team's fielding effort.

On her own run of scores, Kerr said she didn't believe too much in form and was just taking it one game at a time.

South Africa will have a chance at getting back into the series in two days, with the second T20I scheduled in Hamilton on Tuesday, March 17.

Brief scores: New Zealand Women 190/7 in 20 overs (Amelia Kerr 78, Georgia Plimmer 63, Masabata Klaas 2-15, Nadine de Klerk 2-32) beat South Africa Women 110/7 in 20 overs (Tazmin Brits 29, Kayla Reyneke 24, Sophie Devine 4-12, Jess Kerr 2-13) by 80 runs.