With the impetus Duffy gave its bowling performance, New Zealand had Pakistan 5-39 and restricted it to 153-9 after the tourists won the toss and batted.
Opener Tim Seifert made 57 – his fourth T20 half century – to lead New Zealand’s chase at it reached its winning total with seven balls to spare.
He had help from Mark Chapman, who made 34, and Mitchell Santner, who was 12 not out at the end.
Duffy, a right armer from Otago who generates late swing and bounce from an energetic action, took his first wicket with his fourth ball in international cricket and took two more with the fifth and sixth balls of his second over.
He missed his hat trick from the first ball of his third over and was also denied a magnificent outfield catch when he flew high at deep third man to grab a one-hander from the bowling of Blair Tickner only for the television umpire to rule his hand had grazed the boundary rope.
Returning in the 18th over, Duffy took his fourth wicket by dismissing captain Shadab Khan for 42. At that stage, Duffy had 4-13.
“There was a bit of hot and cold stuff in there,” Duffy said. “To be honest, on debut I was just hoping not to get hit all over the park. “The pitch at Eden Park was a quick one when it was used in the first T20 between New Zealand and the West Indies a month ago. But it was slower Friday and, with the ball stopping, playing shots early was difficult.
Duffy and fellow New Zealand quicks Scott Kuggeleijn and Blair Tickner crowded the Pakistan batsmen with full deliveries and also surprised them with bounce. Determined to play their shots, the Pakistan top order batsmen gave up their wickets cheaply as they hit out before taking the pace of the pitch. Several fell to catches in front of the wicket as the ball held up.
Left-arm spinner Santner bowled the first over and Duffy had the first wicket in the second over when he drew a false shot from Shafique Ali, who was caught at mid-on by Mark Chapman.
With successive deliveries in his next over he dropped a caught and bowled chance, then dismissed Mohammad Rizwan (17) and had Mohammad Hafeez first ball, caught at mid-on.Kuggeleijn dismissed Haider Ali with the first ball of the next over to complete a team hat trick – three wickets in three balls.
He also removed Imad Wasim (19) and Ish Sodhi dismissed Khushdil Shah (16) before Duffy returned to claim the wicket of Shadab, who was caught in the deep by Sodhi.
Pakistan was in trouble at 79-6 but Faheem Ashraf hit 31 from 18 balls to boost the total.New Zealand also had nervous moments, falling to 2-21 before Seifert and Glenn Phillips (23) put the innings on an even keel. Seifert and Mark Chapman (34) then added 55.
New Zealand and Pakistan must step up with captains absent at Eden Park
India need to do well against Australia and England as World Test Championship final race heats up
New Zealand captain Kane Williamson, wife Sarah Raheem welcome a baby girl
Javed Miandad feels Babar Azam’s absence should not affect Pakistan in New Zealand T20I series
New Zealand vs West Indies: Jason Holder wants neutral umpires to resume duty in international matches
New Zealand vs West Indies, 2nd Test: Hosts seal series whitewash, join Australia atop Test rankings
Pakistan in New Zealand: Babar Azam ruled out of T20 series due to fractured thumb
New Zealand vs West Indies, 2nd Test, Day 3: Holder, Da Silva show some fight to delay defeat
Pakistan in New Zealand: Lockie Ferguson’s absence won’t make big difference, says Haider Ali
New Zealand vs West Indies: Kyle Jamieson, Tim Southee wreck Windies
Kane Williamson, Trent Boult back to New Zealand T20 squad, Ross Taylor dropped
Henry Nicholls hundred powers New Zealand to healthy position against West Indies
Get breaking news alerts.
You have already subscribed