The Blackcaps are sweating on a scan to see if Trent Boult will be fit for the second test against England, which starts in Hamilton on Friday.
New Zealand's senior bowler only managed one over on the final day of the first-test win, before succumbing to a side strain.
Captain Kane Williamson was also forced from the field late, but has since been cleared of any significant injury.
"He fell over and felt a little bit of tightness," said coach Gary Stead. "But he's had treatment and he's fine."
But the signs aren't as encouraging for Boult. He's undergone an MRI to determine the extent of the damage - the results are due on Wednesday - but he's unlikely to start the second test.
Speedster Lockie Fergsuon, who toiled for 1/76 for Auckland in Monday's one-day domestic match against Wellington, and Matt Henry are the obvious replacements, but the Hamilton pitch may have the final say.
"If it's a very dry-looking wicket, there is the potential to play two spinners," said Stead.
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