Kane Williamson conceded Australia did not give New Zealand any leeway as Aaron Finch's side cruised to their maiden T20 World Cup crown.

Williamson, who was dropped on 21 by Josh Hazlewood, struck 85 from just 45 balls to guide his side to 172-4 from their 20-over allocation in Sunday's final.

That was the joint-highest score in a T20 World Cup final – along with Marlon Samuels' knock against England in 2016 – and the fastest-half century ever scored in the showpiece of the competition.

However, Williamson held those records for a short time as Mitchell Marsh, who blasted his first ball over square leg for six, delivered a brutal unbeaten 77 from 50 deliveries to see Australia over the line.

After Australia completed their second magnificent run chase in four days, following victory over Pakistan in the semi-final, Williamson admitted New Zealand's trans-Tasman rivals never gave his side a chance in the chase.

"We were trying to get a bit of a platform and the surface was holding a platform," Williamson said during his post-match interview on the field.

"We got what we thought at the halfway stage was a good total, but it was chased superbly by Australia.

"We made every effort to get a good total. Guys came out and committed to their plans. We weren't far away but having said that, credit to the way Australia chased that total. They did not give us an inch.

"I'm really proud of our teams efforts throughout the tournaments. We came here and gave it our best shot, but it wasn't good enough tonight."

Trent Boult, whose figures of 2-18 proved in vain, provided New Zealand with the briefest glimmer of hope when he bowled David Warner (53) in the 13th over.

But Williamson appreciated that Australia were a class above as he looked back on yet another final loss, previously losing to England in the 2019 World Cup.

"Australia are a team full of amazing players," he added. "Today they really turned it on.

"We finish this campaign and such is life in the international schedule is you move your focus. No doubt we're feeling this one a little bit.

"We had high hopes coming into the game. It's never nice. You sign up to these sort of things. It's just a shame we couldn't get the job done tonight."