Black Caps fast bowler Adam Milne is being handled with caution to ensure his longevity in international cricket.
Milne, who possesses express pace, made a strong return to the Twenty20 and one-day arena on New Zealand's tour of Zimbabwe and South Africa in August after a long spell out with injury.
But he has been left out of the Test squad to face Australia in November, and the New Zealand A one-day and four-day squads for matches against Sri Lanka in October.
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Black Caps coach Mike Hesson says medical staff are taking a methodical approach with Milne's comeback.
He says the 23-year-old is progressing well, but even during the tour of Africa was still unable to bowl two days in a row, which ruled him out of Test contention.
"We're hoping to give him some first-class cricket early to build him up to that," he said.
The same rationale applied to Milne's absence from the NZ A squads.
"He's a commodity that we want to take care of," Hesson said of a player who has pushed the speed gun over 150kph.
"We want to make sure we get a long period of time out of him rather than rush him back and break him again."
Milne, who has yet to make his Test debut, suffered a heel injury during the latter stages of this year's World Cup.
The problem kept him out of the Indian Premier League and the Black Caps' tour of England.