Australia players line up before the match. John Sibley/Reuters
Australia captain Aaron Finch decided to bat first after winning the toss in a World Cup match against New Zealand at Lord's on Saturday.
A sun-drenched day and baking hot temperatures made batting first in the day/night fixture an understandable decision.
"It's a used wicket so hopefully later on it will slow up and take more spin," said in-form opener Finch.
"I think it's a totally different wicket to the other day. There will be something in it first thing for both sides with the new ball."
Reigning champions Australia, who beat New Zealand in the 2015 final in Melbourne, have already qualified for the semi-finals.
They were unchanged from the side that beat tournament hosts England by 64 runs at Lord's on Tuesday, with Australia deciding against resting fast bowlers Mitchell Starc, Pat Cummins and Jason Behrendorff.
New Zealand, who will assure themselves of a place in the last four if they win, made two changes to the team that suffered a six-wicket defeat by Pakistan at Edgbaston on Wednesday.
Henry Nicholls replaced struggling opening batsman Colin Munro and spinner Ish Sodhi came in for fast bowler Matt Henry on a pitch expected to take turn.
"We would have had a bat. It's a used surface on the dry side but it's important we do the job first up," said New Zealand captain Kane Williamson.
"We have played on so many different surfaces that pose different challenges, but today is another day.
"These are always great games and the trans-Tasman thing goes across all different codes. It's not just a one-off, it's one of nine (group matches) and who knows what happens after that?"
New Zealand: Martin Guptill, Henry Nicholls, Kane Williamson (capt), Ross Taylor, Tom Latham (wkt), Jimmy Neesham, Colin de Grandhomme, Mitchell Santner, Ish Sodhi, Lockie Ferguson, Trent Boult
Australia: Aaron Finch (capt), David Warner, Usman Khawaja, Steve Smith, Glenn Maxwell, Marcus Stoinis, Alex Carey (wkt), Pat Cummins, Mitchell Starc, Jason Behrendorff, Nathan Lyon
Umpires: Joel Wilson (WIS), Richard Illingworth (ENG)
TV umpire: Richard Kettleborough (ENG)
Match referee: Richie Richardson (WIS)
Australia and India will be aiming to finish top of the World Cup league phase and so avoid facing hosts England in the semi-finals as they prepare for the final day of round-robin matches.
It was a superb display by the underdog Black Caps, who came into the match on the back of three straight defeats by Pakistan, Australia and England and only qualified for the semi-finals on net run-rate, while India topped the 10-team group stage.
Reigning champions Australia made one change after a surprise 10-run defeat by South Africa at Old Trafford, with the recently called-up Peter Handscomb replacing injured batsman Usman Khawaja.
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