Ireland caused the first major upset of the Rugby World Cup at Eden Park on Saturday night when they beat Australia 15-6.
With most of the crowd of 55,000 behind them, the Irish ran themselves to a standstill to deny the Australians, who looked vulnerable without injured openside flanker David Pocock.
In a tryless encounter the two sides were locked at 6-6 at half-time before Ireland edged ahead three points at a time in the second half.
For the winners, Jonathan Sexton kicked two penalties and a dropped goal and Ronan O'Gara two penalties, while Australia couldn't improve on James O'Connor's two first-half penalties.
It was a famous victory for the Irish, based on an utterly dominant forward-pack display. The Australians were penalised five times for collapsing the scrum.
"It was the performance we knew we had in us," Irish skipper Brian O'Driscoll said in a post-match interview.
"We swear we were in Dublin with that crowd. Absolutely incredible support and it was our job to give them something to shout about and thankfully we did."
Wallabies skipper James Horwill said his side played "some dumb footy".
"We weren't good enough. We didn't given enough clean platform for our backs and they did well to spoil us and they played well and they deserved their win."
Australia-South Africa quarter-final looms
The defeat puts Ireland top of its pool and leaves Australia on a quarter-final collision course with defending champions South Africa, who roared back to life with a 49-3 thrashing of Fiji earlier on Saturday.
Presuming they account for the United States next week in Wellington, then Russia in Nelson and negotiate a way past the Springboks, the Wallabies would almost certainly run into the All Blacks in the semi-finals.
The loss was also just Australia's second in a pool stage at a Rugby World Cup (the first was losing 27-18 to South Africa in 1995).
For Ireland, however, it was long-overdue payback for four losses to Australia at previous Cup tournaments, the most shattering a last-ditch 17-16 quarter-final defeat in Dublin in 1991.
Scorers
Ireland Penalties: Jonathan Sexton (2), Ronan O'Gara (2). Dropped goal: Sexton.
Australia Penalties: James O'Connor (2).
Referee Bryce Lawrence (New Zealand).
Half-time score 6-6.
