With a resurgent Argentina piling pressure on, an incisive Drew Mitchell moment regained control for Australia and set up a Rugby World Cup final against archrival New Zealand.
In the capital of rugby-obsessed New Zealand, bars are packed by breakfast time when the All Blacks are playing in the World Cup.
Australia's last gasp win over Scotland on Sunday made it an all Southern Hemisphere semifinal lineup for the first time in Rugby World Cup history.
Julian Savea scored a bulldozing hat-trick as New Zealand delivered a record-setting rugby masterclass to rout France 62-13 and set up a World Cup semifinal against South Africa.
Nicolas Sanchez steered Argentina into the World Cup semifinals with a thrilling 43-20 victory over injury-depleted Ireland on Sunday.
Japan's 28-18 win over the United States on Sunday brought the curtains down on a Rugby World Cup pool stage that it lit up.
Scotland reached the Rugby World Cup quarterfinals by beating Samoa 36-33 in a thrilling Pool B game on Saturday, denying Japan a last-gasp shot at advancing to the knockout stage for the first time.
With a mighty defensive effort while down two men, Australia edged Wales 15-6 in a dramatic, tryless Pool A decider on Saturday to avoid a Rugby World Cup quarterfinal showdown with South Africa.
England thrashed Uruguay 60-3 in its last Rugby World Cup pool match on Saturday, ending an otherwise miserable campaign that raised questions about its ability to compete at the highest level.
The All Blacks remain short of their champion best and were rattled by the Tongan forwards before some Nehe Milner-Skudder magic set up a 47-9 victory on Friday.