The future is now for Cameron Green after he proved "as good as any allrounder in the world" this Ashes, igniting an embarrassing England collapse of 10-56 that delivered Australia a 4-0 series win in Hobart.

Rory Burns and Zak Crawley logged England's highest opening partnership of the five-Test series, advancing to 0-68 on day three of the series finale.

But England's bright start to their pursuit of 271 was followed by two hours of bumbling and bungling at Bellerive.

Joe Root's side lost 10 wickets in 22.4 overs to be all out for 124, handing Australia a 146-run win in the fifth Test.

Green, long regarded as Australian cricket's brightest prospect, was the catalyst for the chaos after Pat Cummins threw him the ball as the sun set.

The young gun, having delivered 44 wicket-less overs against India in his debut series, captured the scalps of Burns, Crawley and Dawid Malan in a six-over spell either side of tea.

There was a lot of pre-series talk about it being unfair to compare Green with Stokes, yet the reality is the 22-year-old outperformed England's hobbled talismanic allrounder with bat and ball this series.

"Last summer I thought he showed signs of his potential and this summer he was really confident," Cummins said.

"He grew as a batter and bowler.

"He's as good as any allrounder in the world at the moment."

Green's inspired spell came on the same day he scored 23 while adding 49 runs alongside Alex Carey, sharing Australia's best partnership in a slapdash second-innings total of 155.

Cummins, denied a rare whitewash because England's final-wicket pair hung on for two overs to salvage a draw in Sydney, said he felt "really lucky" to have Green in his XI.

"When he's next in to bat I just feel so calm," he said.

"He showed last week in particular that he absolutely belongs at this level as a Test batter. Then as a bowler, he's a genuine fourth quick.

"You forget how young he is. To see him at gully as well, he's the absolute complete package.

"But he is young, so we have to keep looking after him."

Travis Head earned man-of-the-match and player-of-the-series honours after signing off with a vital first-innings century in Hobart.

Stokes gifted his wicket to Mitchell Starc, while embattled captain Root's hopes of salvaging some pride were scorched by Scott Boland's unplayable shooter.

Root grinned in disbelief then threw his head back after the pink ball hit a crack and struck the bottom of off stump, knowing there was nothing he could have done to stall Australia.

"It has been a frustrating, tough tour," Root said.

"It is pretty obvious we need to put some more runs on the board as a batting group, too often we have not given our bowlers enough to work with.

"In all areas ... we have been outplayed and credit to Australia."

THIS ASHES' ACE ALLROUNDERS

*Cameron Green - 228 runs at 32.57 (8 inns), 13 wickets at 15.76 (80.4 overs)

*Ben Stokes - 236 runs at 23.6 (10 inns), 4 wickets at 71.5 (63.3 overs).