The Wallabies most recently spoiled the party in Sydney in 2014 when holding the All Blacks to a 12-12 draw as Steve Hansen's men teetered on the brink. Given that history, and the feelings between the two teams this year - which came to a head in Wellington in August when the Wallabies played the man rather than the ball - the motivation to get to the magical 18 victories in a row and beyond could hardly be greater.
"The Aussies are certainly mentioning it, and we're mentioning it," Foster said regarding the record. "There's no point denying the fact that we're sitting on 17."
Foster believed the Wallabies performances in beating the Pumas at Twickenham in their last test and losing a relatively close one to the Springboks in Pretoria showed how far they had come this year. Cheika's side were on a five-match losing streak this year following their 29-9 hammering by the All Blacks in Wellington before they they beat the Boks and Pumas in their first two tests against the nations in the Rugby Championship.
"Looking at their [recent] tests against Argentina and South Africa, they've taken a lot on board from those first two tests and they've moved on and I think playing a better style of rugby," Foster said. "They look like they understand what they're trying to do more. We probably have too. We've certainly stepped up from August so I think there's two improved teams - we'll see who has improved the most.
"The energy levels are high now and there's that mental freshness that comes in. There's an edge that generates when you know you have to get through the same amount of work [in a shorter time].
"After this extended break we'd expect everyone to be on top of their game."
Foster said the team had put a full stop to the Aaron Smith affair after last night's statement by New Zealand Rugby that the halfback had voluntarily stood down from the test. Augustine Pulu has been called up to cover for TJ Perenara and Tawera Kerr-Barlow in Smith's absence.
As usual, the focus this week is on performing at training in order to perform on Saturday in what is looming as one of the most important tests for the All Blacks this year. A world record is at stake, and they generally don't come easy.