Argentina made history Saturday with a stunning 25-18 Rugby Championship win over New Zealand in Christchurch, piling further pressure on the All Blacks and their retained coach Ian Foster.
Playing with passion and physicality, the Pumas won the battle of the breakdown and benefited with 20 points from the boot of wing Emiliano Boffelli.
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They achieved their first ever win over New Zealand just two years ago in another championship match in Sydney and Saturday's victory was from the same mold with magnificent defence backed up by iron discipline.
"I'm very proud of our team, we are starting to believe what we can do, not just a magic moment like our first win (in Sydney)," said captain Julian Montoya.
"Very, very happy, very, very proud, it's a very special moment for us."
The boot of winger Emiliano Boffelli, who kicked five penalties, kept them in the contest when New Zealand scored two tries in the first half and kept them ahead after flanker Juan Martin Gonzalez had scored an opportunist second-half try.
New Zealand, who played the last nine minutes with 14 men after Shannon Frizell was shown a yellow card, will almost certainly be plunged back into the crisis that was apparently ended by their victory over South Africa two weeks ago.
Tries from Samisoni Taukei'aho and Caleb Clarke should have given them a comfortable lead at halftime but ill-discipline throughout the match cost them dearly.
"It certainly felt in the first half that we were more dominant in areas than we managed to show on the scoreboard," All Blacks captain Sam Cane said.
"A lot of credit has to go to Argentina for the way they stuck in it and eventually turned the tables."
The victory gives Argentina successive wins in the Rugby Championship for the first time after their impressive 48-17 thrashing of Australia in San Juan two weeks ago.
They also remain top of the championship standings on points difference ahead of Australia, who earlier beat South Africa 25-17 in Adelaide.
They lodge just their second win over the All Blacks and their first on New Zealand soil.
The home side, who squandered an early 15-6 lead, have now lost six of their last eight Tests and can expect more severe criticism after the pressure had eased following their defeat of the Springboks in Johannesburg.
Foster was given full support after their victory at Ellis Park, with the Kiwis now under major pressure to bounce back in Waikato.