Valentine Holmes scored a record five tries as holders Australia ruthlessly dismantled Samoa to book their place in the 2017 World Cup semi-finals.
Five first-half tries, including doubles for Holmes and Michael Morgan and a Billy Slater score, set the platform in hot and sticky Darwin.
Holmes added three more after the break to become the first man to score five tries in the same game at a World Cup.
Samoa were kept scoreless, the Kangaroos’ second shut-out in a row.
Australia play the winner of the New Zealand v Fiji quarter-final, in the last four in Brisbane next Friday.