Martin Guptill blasted New Zealand to a comprehensive seven-wicket victory in the decisive fifth Twenty20 international against Australia to secure a 3-2 series triumph on Sunday.

The Black Caps restricted Australia to 142-8 from their 20 overs after the visitors won the toss and elected to bat in Wellington, with Ish Sodhi taking 3-24.

Guptill (71 from 46 balls) eased any anxiety about a smaller run chase on a pitch being used for the third time this series, with New Zealand claiming victory with 27 balls to spare.

New Zealand's successful chase bucked the series trend of the side batting first winning every game.

Australia captain Aaron Finch said: "We probably just weren't aggressive enough with the bat. We probably let them dictate slightly, but we didn't get enough runs and kept losing wickets at regular intervals.

"A couple of us put a fair bit of time into our innings, 20, 30, 40 balls and then to not go on with that it was probably the difference in the game. If one of us gets 60 or 70, that might be a 160-170 score and then you're a couple of good power-play overs away from really squeezing."

Sodhi was named as the player of the series, finishing with 13 wickets at an average of 12.07 across five games.

The win was set up by a disciplined bowling display led by Sodhi, while Trent Boult (2-26 with 10 dot balls) did early damage, Mitchell Santner (0-21 with 10 dots) was tight and Tim Southee (2-38 with eight dots) restricted Australia at the death.

Boult trapped Josh Philippe lbw early before Finch (36 from 32 balls) and Matthew Wade (44 from 29 balls) put together a 66-run second-wicket stand.

Finch, who came under pressure earlier in the series after a poor run of form on the back of the Big Bash League, managed one six and five fours during his knock, while Wade hit two maximums and three fours.

Sodhi got the breakthrough with Finch slicing to Santner at point, leaving Australia 74-2 after 10 overs before the innings fell away, with Glenn Maxwell falling for one, Ashton Agar for six and Mitchell Marsh for 10.

Australia lost 68-6 in the final 10, including being restricted to 36-4 from the last five overs, battling an inconsistent pitch and tight New Zealand bowling.

Devon Conway (36 from 28) and Guptill combined for a 106-run opening partnership in the chase, before Glenn Phillips (34 not out from 16) finished the job.

Guptill blasted four sixes and seven fours in his knock, going at a strike rate of 154.35.

Riley Meredith (2-39) took two wickets in two balls, with Conway caught in the deep by Agar and Kane Williamson trapped lbw for a golden duck, but it was too little, too late.

The defeat compounds a bad 24 hours for the Aussies, after India's Test win over England on Saturday confirmed Australia would miss the Test Championship final.

Black Caps captain Williamson said: "Incredibly hard-fought series and momentum shifts throughout. Then to finish with three games on a surface, try and get a read on it was a real challenge."

Record-breaker Aaron Finch is relishing having fans in attendance when Australia face New Zealand for Sunday's Twenty20 series decider.

Finch hit 79 not out off 55 balls in Friday's series-levelling 50-run triumph to become his country's leading run-scorer in the format, with 2,310 overall.

His four sixes in the final over propelled his side to 156-6 and made Finch the first Australia batsman to reach 100 maximums in T20 cricket.

Finch was the only player who really got to grips with a tough surface, but he was just glad to help make it 2-2 after the tourists had fallen 2-0 behind.

"I've always said I'd rather get a duck and win than get some runs and lose," he said after New Zealand subsided to 106 all out, seamer Kane Richardson (3-19) the pick of the Australia attack as spinners Ashton Agar, Glenn Maxwell and Adam Zampa took two apiece.

"But to get some runs and contribute to a win is really nice. I felt like I was hitting them terribly for a large portion of the innings, but it was one of those wickets where you never really felt totally in, particularly when spin was bowling.

"It was nice to get a few out of the middle towards the end and get us to a decent total."

On the subject of a relaxation of coronavirus restrictions allowing for the return of fans for the final match, he added: "You play professional sport because you love entertaining, you love the atmosphere when you're at the ground.

"I love going to and watching sport, so to have fans at the ground, regardless of whether they're rooting for you or against you, is just brilliant. It provides so much."

Aaron Finch became Australia's record Twenty20 run-scorer with a captain's display as the tourists set up a series decider after a dominant victory over New Zealand in the fourth of five Twenty20 showdowns.

Finch's 79 not out off 55 balls helped lay the foundations for a 50-run triumph, with Australia posting 156-6 in Wellington before bowling out the Black Caps for just 106.

It means the series is now level at 2-2, with Australia having come from two down, and will be settled in the final match on Sunday.

Tim Southee was furious after Finch was given not out on umpire's call following an lbw review in the first over, with his reaction resulting in a formal reprimand for a Level 1 breach of the ICC Code of Conduct.

The fast bowler might have been even more angry had he known the damage Finch would go on to do, the skipper accounting for over half of his side's total to become his country's leading scorer in the format on 2,310 runs.

Finch smashed four sixes off the final over, that explosive spell alone giving him more runs than any of his team-mates, with Marcus Stoinis' 19 the next-best tally.

That fact underlined the tricky nature of the pitch and New Zealand could not get to grips with it as Australia's bowlers made hay.

Kane Richardson took three wickets, while Ashton Agar, Glenn Maxwell and Adam Zampa each contributed two, with Kyle Jamieson – who bowled that expensive over to Finch – providing the only real flourish on the Black Caps' scorecard with 30 off 18 deliveries.

With a thrilling finale in prospect, fans will be allowed to attend the decider in Wellington after a relaxation of coronavirus restrictions.