Daniel Vettori has been replaced in the Northern Knights' Champions League T20 squad by Mitchell Santner after pulling out of the tournament, which begins next month in India.
Northern Knights CLT20 fixtures
13th September v Southern Express, Raipur
14th September v Lahore Lions, Raipur
16th September v Mumbai Indians, Raipur
Vettori has withdrawn from the squad due to a family health matter and the CLT20 technical committee has approved the late change to the squad.
The 22-year-old Santner is also a left-arm spinner who scored his maiden first-class century earlier this year.
"Mitch was very close to selection for our original 15, missing out purely because we had a luxurious abundance of experienced spin bowlers in Daniel, Anton Devcich, Ish Sodhi and Jono Boult," Northern Knights head coach James Pamment explained.
"While we all feel for Dan, we are delighted to be able to now offer a tremendous opportunity for a very talented young man."
The Knights play the Lahore Lions, Mumbai Indians and Southern Express in a bid to qualify for the main group stages of the Champions League T20.
Northern Knights squad: Daniel Flynn (captain), Graeme Aldridge, Jono Boult, Trent Boult, Anton Devcich, Daniel Harris, Scott Kuggelijn, Daryl Mitchell, Mitchell Santner, Ish Sodhi, Tim Southee, Scott Styris, BJ Watling, Kane Williamson, Brad Wilson
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