MARCUS STOINIS was the hero for Australia as he blasted the defending champions to a much-needed seven-wicket victory over Sri Lanka at the T20 World Cup in Perth.

The tournament hosts started the game bruised by a crushing defeat against New Zealand in their first Super 12 match, needing a healthy win to repair both their pride and their net run-rate.

They were making heavy weather of the chase until Stoinis unleashed his display of ball-striking brilliance, crashing 59 not out in 18 game-changing deliveries.

The burly all-rounder had walked to the crease with Australia 89 for three, needing 69 off 46 balls, and walked off again with the points in the bank and 3.3 overs unused.

He struck six sixes and four fours, casting the struggles of skipper Aaron Finch into stark relief. 

Finch finished unbeaten on 31 and even scored the winning runs but his 42-ball stay proved a drag on Australian progress and he was visibly yelling at his own lack of timing at one stage.

The away side posted 157 for six but suffered bad luck when Binura Fernando was forced off injured after sending down just five balls, while highly rated spinner Wanindu Hasaranga had a day to forget. He shipped 53 from his three overs and leaked five sixes.

Finch’s slow going, David Warner’s dismissal by Maheesh Theekshana and a smart catch to dismiss the aggressive Glenn Maxwell gave Sri Lanka a chance to take it all the way but Stoinis tore it away from them.

He arrived halfway through the 13th over, swung with gleeful abandon and reach his half-century in 17 balls, a new Australian record in the format.