New Zealand opener Devon Conway is set to undergo a fitness test on Wednesday to determine his availability for the first Test against Australia in Wellington. Conway injured his left thumb while wicketkeeping in the second T20I against Australia in Auckland, and further scans are being conducted to assess the extent of the damage.

Initial scans ruled out a fracture, but Conway hasn't participated in training since the incident. New Zealand coach Gary Stead mentioned that Conway would not train on Tuesday, and a decision on his participation in the first Test would be made after the fitness test on Wednesday. Conway's ability to bat comfortably is crucial for his inclusion in the playing XI.

Stead expressed the team's desire for Conway to play, emphasizing his importance in the batting order. However, the final decision will depend on the outcome of the scans and Conway's ability to face deliveries in the nets.

On a positive note, Rachin Ravindra is confirmed fit to play after being sidelined from the last two T20Is due to knee soreness. Daryl Mitchell is also available for selection after managing a heel issue. If Conway is ruled out, Will Young is likely to open the batting alongside Tom Latham.

Meanwhile, Neil Wagner has announced his retirement from international cricket and will not be part of the squad for the Tests against Australia. Mitchell Santner is expected to return to the playing XI, providing the team with a spin-bowling option.

New Zealand aims to improve its record against Australia, having not beaten them at home since 1993. The series against the world Test champions presents an opportunity for New Zealand to showcase their skills and competitiveness.