Trent Boult conceded it was "annoying" for New Zealand to only claim four wickets on day one at the MCG after they won the toss in the second Test with Australia. 

The Black Caps claimed a spectacular breakthrough in the first over when Boult found early swing to bowl Joe Burns through the gate for a golden duck.

However, Marnus Labuschagne (63) and Steve Smith (77 not out) ensured it was Australia's day, the hosts reaching 257-4 at stumps.

"Obviously we'd like another couple of wickets on that tally ... winning the toss," said Boult in a news conference.

"The overheads and the way the pitch played in the first hour or two, we tried to make the most of it, but yes, [it's] annoying not to have them a couple more down.

"I think it just turned into a good surface. Definitely when the cloud burned off and the bright blue skies came out, it was just good old-fashioned Test cricket really.

"We tried to stay as patient as we could and I suppose on the positive [side] they haven't got too far ahead of the game in terms of the run rate and runs on the board.

"We've got to come back tomorrow [Friday], hopefully get a couple [of wickets] early and see what happens."

Boult, who hailed the level of support for New Zealand in a crowd of 80,473, could at least reflect on a memorable moment due to his dismissal of Burns.

"I was actually quite nervous before the start of the match," he added. "I don't remember the first ball but it was nice to get that one kind of right, and full and straight.

"To see it swing back [and bowl Burns is great], of course, in any Test match, but with 80,000 people watching it was pretty exhilarating.

"Hopefully there's a few more of them left in the next couple of days and we can get in front here."

The prolific Smith earned praise from Boult after demonstrating plenty of patience while facing 192 balls.

"I thought he played really well - he looked to defend as many balls as he could and obviously hung in there and he's built himself a nice little innings," said the New Zealand seamer.

"He's a quality player ... when he leaves well, defends well and plays quite straight, he doesn't give you too much."