Sportal.co.nz 10.Aug.2012Getty Images
The sides meet in the first two games of the new tournament in Cape Town next weekend and in Mendoza on August 25.
De Villiers told keo.co.za: "These two games are the most important in the tournament.
"Argentina will be psyched up given it's their first appearance they will be throwing everything tey have at us.
"For us, it's important to build on what we achieved in that England series. We were disappointing with the way we ended the series. We have to look at the positives of that series and bring it all together in one 80-minute performance," he said.
The England series ended with a draw in Port Elizabeth but the South Africans are looking to build on that effort, and the chance to have two weeks together before the opening game.
De Villiers said there was a different outlook knowing they could now concentrate on the Test matches without having to go back to Super Rugby.
"There's a different mindset knowing you don't have another tournament to go back to.
"We played against England knowing we would have to go back to the Super 15. But now all of our focus is on this tournament. It must also be a positive that we have a whole extra week to prepare compared to that England series," he said.
De Villiers defended the style of play exhibited against England, although he said greater accuracy would be required in the Championship.
"We didn't have much time for preparation ahead of that England series, so we stuck to a simple game plan. In saying that, we scored two great tries on the counterattack in the second half of that first Test, and we've not seen that side of Bok rugby for a while.
"The rugby we played in the first half of the second Test was outstanding. There are areas that we can improve but there are also good signs.
"Hopefully we can evolve, but the more rugby changes the more it stays the same. It's about getting into the right areas and taking your opportunities," he said.
First five-eighths Morne Steyn, whose kicking fell away in the third Test, was defended by de Villiers. He didn't believe the claims in South Africa that Steyn was in a bad place.
"His general play in that England series was very good, it was only his kicking at goal that let him do a bit. We're so used to him kicking at 90 percent, so when he doesn't there is some concern. But his decision-making on attack has been good, and he's varied his play well," de Villiers said.