'Not a good sign': Ellyse Perry's 'devastating' moment at T20 World Cup

Australia's Twenty20 World Cup hopes are alive after holding off New Zealand by four runs in a sudden-death trans-Tasman battle to secure a semi-final spot.

But the victory looks to have come at a major cost, with a shattered Ellyse Perry hobbling off Melbourne's Junction Oval with a hamstring injury.

The Aussie women sealed their place in the semi-finals of the tournament courtesy of a four-run win over the Kiwis in Melbourne.

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However, the hosts will likely have to navigate the business end of the tournament without arguably their most important player.

Last year's international women's cricketer of the year, Perry, suffered an apparent hamstring injury at the end of New Zealand's 11th over.

Perry overcame an injury cloud to take part in the match, making a quick-fire 21 runs (off 15 balls) with the bat to help Australia to 5-155 off their 20 overs.

The allrounder's injury curse struck again though in the field as she tried to effect a run-out from a quick New Zealand single.

Ellyse Perry clutches her hamstring after injuring herself in the field against New Zealand. Pic: Fox Sports/Getty

Fielding at short mid-off, Perry picked up the ball and sent a diving throw to the non-striker's end, immediately clutching at her right hamstring after hitting the ground.

Groans could be heard from fans around the ground as Australia's medical team came to attend to the stricken allrounder.

Perry cut a shattered figure as she was ushered from the field by a member of Australia's medical team.

The horrible incident left many fans convinced they'd seen the last of the star at the tournament, describing it as a "huge blow" for the host nation.

Perry injury sours gritty win for Aussies

Australia's superstar allrounder was already under a major injury cloud in the lead-up to Monday's crucial game after hurting her hip against Bangladesh last Thursday.

Perry's injury soured an otherwise impressive performance, with Beth Mooney's 60 powering Australia to a formidable total after being sent into bat by Kiwis skipper Sophie Devine.

If the White Ferns had won it would have been the fourth-highest successful run chase in women's T20 World Cup history.

The Kiwis looked threatening at times with the bat, on pace with Australia's score after the powerplay.

Even as wickets fell regularly, solid contributions from Devine (31), Maddy Green (28) and Katey Martin kept the White Ferns in the game.

But the total proved to be too much as young legspinner Georgia Wareham (3-17) and opening bowler Megan Schutt (3-28) tied down the White Ferns with brilliant spells.

Needing an impossible 10 runs to win from the final ball, the White Ferns finished off with a six.

Earlier, Mooney, who smashed an unbeaten 81 in her last innings, was forced to dig deep after opening partner Alyssa Healy tried one big shot too many and was caught at midwicket for nine.

Captain Meg Lanning (21) and Ashleigh Gardner (20) weren't able to capitalise on their promising starts and push Australia to an even more formidable target.

Australia join unbeaten India as semi-finalists from Group A and Lanning's team will now face South Africa or England at the SCG on Thursday.

With AAP