The New Zealand wicketkeeper BJ Watling and all-rounder Corey Anderson are in doubt for the second cricket Test against England starting at Headingly on Friday.
Watling suffered a knock to his knee on the opening day of the first Test at Lord's while Anderson had problems with his back.
Watling handed the gloves over to Tom Latham in the Lord's match, although he did managed to bat, scoring half centuries in each innings.
Anderson had problems in the field and with the ball, only managing 8 overs.
Coach Mike Hesson rates Watling as 50-50, while he says Anderson was in a fair amount of pain during the game, so they'll have to continue monitoring him.
Watling's injury could pave the way for Luke Ronchi to make his Test debut.
The Wellington gloveman has played 49 one-dayers, but is yet to play the longest form of the game for his country.
There isn't an obvious all-rounder replacement in the squad, which presents Hesson with more of a headache.
Hesson says this week they'll concentrate on rest and recovery to make sure they're fresh for Headingly.