SCORE: England 194-7 off 20 overs (E Morgan 80 not out off 46 balls, D Malan 53 off 36; T Southee 2-22 off four overs) beat New Zealand (M Guptill 62 off 47 balls, C Munro 57 off 21) by two runs.
That means his white ball worldwide debut could come in Hamilton on Sunday (1am start United Kingdom time).
England coach Trevor Bayliss has called for less Twenty20 cricket to be played on the global calendar and predicted that the format will become increasingly separated from the sport's longer forms in future.
"I can't see the point of going through all the hassle and all the criticism of getting him out here when some have felt, 'No, don't!' And then asking him to carry the drinks".
Chris Lynn says Australia would relish facing a "deflated" New Zealand in the Twenty20 tri-series final after pulling off a record run chase during their last meeting. "You've got guys who only play T20 and that's their chance to play worldwide cricket, so absolutely".
After a five-month absence Ben Stokes could make his England comeback in the first one-day worldwide against New Zealand on Sunday.
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Set a target of 195 victory and 175 for progression to the final, the Black Caps hit the latter easily in Hamilton but couldn't quite reach the former.
With England spinner Adil Rashid opting to only play white-ball cricket for Yorkshire in the upcoming county season, Bayliss pointed out that he won't be surprised if more players follow in the 30-year-old's footsteps.
Black Caps coach Hesson admitted workloads need managing but said T20 cricket is an important revenue earner, especially for the smaller nations.
"Ben has fitted right back in and it only seems like yesterday that he went away", said Bayliss.
Williamson said it was a crucial win for New Zealand, who can seal a spot in the final of the triangular series with a win over Australia on Friday in Auckland.
However, today we would like to talk about the fifth match of the tournament which was between Australia and New Zealand. "I think they might be a little bit deflated about us chasing down that total".