Conway suffered the blow in the second over of the match when he took a sharp delivery from Adam Milne down the leg side. He was briefly treated on the field before deciding not to continue and Finn Allen took the gloves for the rest of the innings.

Conway went to hospital for x-rays and did not bat during New Zealand's chase. He was cleared of "an obvious fracture to his left thumb" but was ruled out of the final T20I and returned home to Wellington on Saturday for further assessment.

"It's still a little bit unknown. Last night he had some strange things going with his thumb, it was clicking a little bitbut at this stage he has been cleared of a break which is great. He'll see a hand specialist tomorrow in Wellington and we'll find out more then."

"Not as much concern around Rachin," Stead said. "He does have a bit of a niggly left knee. Think it's unlikely he will play tomorrow with the Test matches in mind, but we are very confident that he will still progress well to be right for that first Test match. He's slightly better today than what he was yesterday which is the encouraging signs we want."

Ahead of the first Test, both Mitchell (foot) and Matt Henry (hip) are progressing well in their recoveries. "Very confident they'll be good to go," Stead said.

Kane Williamson's partner, Sarah, gave birth to their third child, a girl, earlier this week which ensures he will be available for the Test series having missed the T20Is.

"T20 cricket is pretty fickle, and that first game could have easily gone the other way," he said. "You move on very, very quickly. We want to take the learnings and make sure we put them into practice, but there's still a lot of good things that have come out of the last two games.

"Ben Sears, for example, I thought was fantastic, a young guy early in his career. Thought Lockie Ferguson in the two games has bowled superbly well and looked somewhere back to near his best which is really exciting to see.

"We are pretty realistic. Yes, we didn't get the result we wanted last night but there are a number of guys who will come back into our side as well around the World Cup which will make a big difference in terms of experience."