New Zealand number eight Kieran Read believes it would be a "massive achievement" should they make it a clean sweep in a calendar year.
The 28-year-old went on to say though that they would prefer to do so by playing very well, which he said they had failed to do in recent weeks.
No international team in the professional era has enjoyed a perfect calendar year, with the All Blacks side led by Wayne Shelford that won all seven of their Tests in 1989, the last major nation to achieve the feat when rugby union was still an amateur sport.
New Zealand themselves came close to perfection again when they won eleven games and drew one under John Hart in 1997.
Read, who scored an excellent try in the victory over England last Saturday, said they were not out to win ugly to achieve the record, but to do it in style.
"I think it would be a massive achievement," he said.
"I think we'd rather give a great performance at the weekend and get a win from that and actually showcase our talents and our game plan.
"It is a massive achievement if we get it done."
Read, capped over 50 times and who has captained them on seven occasions, said he thought the present team were a more attractive outfit to watch than the one who won the 2011 World Cup.
"I think we're playing a better style than what we were back then," he said.
"It's hard to compare - it's apples to apples really in terms of personnel.
"Certainly our culture is great at the moment and we're playing, certainly, a better style of footie.
"If we get it right it's pretty exciting to play in and certainly good to watch as well. It's hard to compare but all I'd say is that it's certainly a great team to be a part of."
Read, who plays his Super Rugby for Crusaders, said the present team had shown in the games against England and France that despite not performing at their best, they had shown good mental resolve to hold on and win.
"I don't think we're a team that was playing our best footie in the last two weeks," he said.
"Sometimes it's hard up here in the conditions and the teams that you play. You've got to grind out wins and certainly our mental ability in those games was pretty high when it needed to be.
"We're a team that loves to play well and win playing well, and we'll hopefully do that this weekend."
Read, who became the undisputed first choice at number eight in 2009, said that he expected a much more solid performance from the Irish than the one last Saturday when they were outplayed 32-15 by Australia.
"I don't think they'll be very happy with the way they turned up," he said.
"They're a much better side than what they showed against Australia, across the board really. So I'd expect a totally different team when we play them on Sunday."
And if Read needed any further motivation to perform at his best one more time, his father provided it.
"My dad emailed me and pretty much said you're only as good as your last test match," he said.
"So pretty much that's my focus to make sure that I get out there and do the job. This is the one that people will remember instead of the one last year (the defeat to England at Twickenham which prevented them winning all their Tests) which we didn't get right."