New Zealand won the Rugby Championship for the sixth time with a 35-17 win over Argentina in Buenos Aires.
Victory gave the All Blacks an unsurpassable seven-point lead over South Africa with one game to play.
A shock 36-34 win in Wellington this month had given South Africa hope that they could overtake New Zealand and win the competition for the first time.
That result left the All Blacks needing a win to secure the title, and they outscored Argentina by five tries to two to collect a bonus point as well.
The world champions were missing several regulars in Buenos Aires, particularly in the pack, but it made little difference as they recovered from a shaky first five minutes to dominate a team who have still to record a win against them in 28 games.
“I don’t know if we’re the finished product yet. They are a young team that were out there for large parts of tonight so it was pretty pleasing,” said New Zealand coach Steve Hansen.
New Zealand went behind to a Nicolas Sanchez penalty after just five minutes but Rieko Ioane put the visitors ahead two minutes later.
Sonny Bill Williams was given a yellow card four minutes before half-time but the home side could not take advantage.
Both teams scored two tries during the second half with Patrick Tuipulotu and Anton Lienert-Brown crossing for New Zealand and Barrett and Richie Mo’unga converting.
Tomas Cubelli and Emiliano Boffelli were the Argentine scorers and Sanchez added the conversions.
“They’re the best in the world,” said Cubelli. “We weren’t the team that we can be.”
South Africa withstood second-half pressure to beat Australia 23-12 in the Rugby Championship in Port Elizabeth South Africa.
The Championship concludes next Saturday with South Africa at home facing New Zealand in Pretoria and Argentina hosting Australia in Salta Argentina.