David Warner saw signs of Trent Boult's best in the second Test, underlining how much of a loss the swing specialist would be if ruled out of the day-night clash.
Warner captained Boult at Indian Premier League club Hyderabad this year, giving him a chance to see the 26-year-old's in-dippers at a different angle.
Warner also watched Boult grab a five-wicket haul in Auckland during the World Cup, when he sliced through Australia's middle order.
Given his white-ball feats, Boult was expected to be a handful in the inaugural day-night Test that starts on Friday at Adelaide Oval.
However, the left-armer starts the series underdone and is now in doubt for the final Test due to a back niggle.
Boult will need to train well on Wednesday to convince NZ coach Mike Hesson he is fit enough to play the innovative fixture.
Boult has been down on pace and lacked control for much of the first two Tests.
But he dismissed Warner twice at the WACA and had a confident lbw shout that went within a whisker of dismissing Australia's vice-captain on review.
"The way he's bowled has been a little bit far from his best. I can see that," Warner said.
"The way he bowled to me in that second day was the Trent Boult that I see as an international cricket player.
"He put the ball in the right areas, questioned me the whole time then nicked me off.
"I've got to work out how can I not allow him to do that again."
Warner revealed he has been watching footage of Boult bowling to left-handers in an effort to nullify the Blackcaps bowler.
"I've worked out my way to try and tackle him and try to not get out to him. I'll keep that to myself," he said.
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