Australia are in a commanding position against New Zealand but double-centurion David Warner believes the second Test could be decided in the "last hour" at the WACA.
Warner was out early on day two after adding just nine runs to his overnight total of 244, having set the record for an individual score on the first day of a Test in Australia.
The opening batsman's brilliant career-best knock put Australia on course to seal a series win after he also scored two centuries in the first Test triumph at the Gabba last week.
Australia declared on 559-9 on Saturday, before Mitchell Starc and Nathan Lyon dismissed Martin Guptill (1) and Tom Latham (36) respectively as New Zealand were reduced to 140-2 at stumps.
The elegant Kane Williamson (70 not out) and Ross Taylor (26no) saw the tourists through to stumps, but they trail by 419 runs and face a major battle to avoid another defeat.
Warner expects more resistance from New Zealand over the next three days as the pitch begins to deteriorate.
He said: "It looks like there's signs of cracks, (but) it's nice and hard, and quite slow for a WACA wicket.
"The ball's actually getting quite soft, and towards the end there, there was a little hint of reverse (swing), and that might come into play.
"At the end of the day, we have to take 18 wickets to win this Test, it's probably one of those games that's going to go five days and come down to the last hour I reckon."
Warner also spoke of his admiration for Williamson, who followed up his knocks of 140 and 59 in Brisbane with another impressive innings.
The Australia vice-captain said: "He's a fantastic player - one of the best players in the world at the moment. The last 12 months has been superb for him and he's been their rock.
"He's proven that today again. He gets himself in, it's a nice batting wicket, he puts away the bad balls and that's how patient he is.
"That's what you have to do to score big runs in this form of the game and he's showing his team and us how to bat as well."
Australia batsman Usman Khawaja suffered a hamstring injury on day two and will undergo a scan on Sunday, having scored a second century in as many Tests on Friday.