Batting first, Pakistan looked set for a more competitive total with Fakhar Zaman at the crease but when he departed for 70 the wheels came off.
Andile Phehlukwayo, Dwaine Pretorius and Wiaan Mulder tore through the middle order with only Imad Wasim, who finished unbeaten on 47, offering any resistance in Pakistan’s total of 240-8.
In response Quinton de Kock smashed 83 off 58 balls while Faf du Plessis and Rassie van der Dussen both ended 50 not out as South Africa romped home with 10 overs remaining.
“Quinny made it easy for the rest of the batters,” South African captain Du Plessis was quoted as saying by AFP.
“Our best performance came tonight in a crunch game,” he added. “The bowling was excellent and the fielding was really good. And when Quinny plays like he did tonight he’s extremely difficult to bowl to.”
Pakistan stand-in captain Shoaib Malik said the top order needs to fire in unison to succeed in ODIs.
“Our top three batters got starts and we wanted them to capitalise,” Malik said. “White-ball cricket is all about the first three batters.”
Malik also congratulated opening batsman Imam-ul-Haq, who was named man of the series after scoring 271 runs at an average of 54.20 in five innings. “He is improving day by day,” added Malik.
Right arm pacer Thomas has made a big impression in the four ODIs and six T20s he has played so far, clocking speeds in excess of 150kph. He was picked as a cover for pacer Alzarri Joseph in the first Test and has now been made a member of the squad.
The hosts retained the rest of the squad after crushing England by 381 runs in the first Test in Barbados.
“Oshane Thomas was with us in Barbados as cover and he has been added to the squad as the 14th player and will remain with the team as an additional fast bowler. We were all extremely happy with the great result in the first Test. We want to see them put in another solid performance in the second match in Antigua, where we won last year,” Courtney Browne, the chairman of selectors said.
Squad: Jason Holder (c), Kraigg Brathwaite, Darren Bravo, Shamarh Brooks, John Campbell, Roston Chase, Shane Dowrich (WK), Shannon Gabriel, Shimron Hetmyer, Shai Hope, Alzarri Joseph, Kemar Roach, Oshane Thomas, Jomel Warrican
The Kiwis trail the five-match series 3-0 after being outplayed in all matches and decided to ring in the changes for last two games. However, out-of-form openers Martin Guptill and Colin Monro managed to retain their places.
Guptill and Monro’s stands have been 10, 23 and five so far.
Neesham returns in place of all-rounder Doug Bracewell, while Astle comes in for out-of form leg-spinner Ish Sodhi.
Astle has recovered from a knee injury which kept him out of New Zealand’s series against Pakistan in November.
“It’s great to welcome back the all-round skills of Jimmy and Todd and we’re looking forward to seeing what they can bring to the series,” selector Gavin Larsen said.
“We’re still looking to keep our options open with selections at this stage and ensure we continue to learn as much as we can about our players.”
New Zealand squad: Kane Williamson (c), Todd Astle, Trent Boult, Colin De Grandhomme, Lockie Ferguson, Martin Guptill, Matt Henry, Tom Latham, Colin Munro, Jimmy Neesham, Henry Nicholls, Mitchell Santner, Tim Southee, Ross Taylor