Pakistan's all-format captain Babar Azam and opening batsman Imam-ul-Haq have been ruled out of the first test against New Zealand with thumb injuries.
Azam is ranked the fifth-best batsman in the test format.
Both batsmen fractured their thumbs during training session last week and have yet to return. The Pakistan Cricket Board said in a statement on Monday that the team's medical staff is closely monitoring the progress of both players.
"A decision on their participation in the second test, which commences in Christchurch on Jan. 3, will be made closer to the time," the PCB said.
Wicketkeeper batsman Mohammad Rizwan will lead the side in the first test, starting at Mount Maunganui from Dec. 26.