Richie Mo'unga received surgery on Sunday for his fractured bone in his left hand. Following the game against the Brumbies on Saturday Mo'unga reported a sore hand and following the testing it was the fracture was revealed.
He is expected to miss the next 6-8 weeks to recover and return to action.
Scott Robertson is optimistic about flanker Matt Todd, who was withdraw just before the game to treat his infected leg, will be available to face the Highlanders.
Seta Tamanivalu is in doubt as he suffered from a hamstring strain in the second half.
Digby Ioane is still recovering from the blow to the hip from pre-season.
Utility back Tim Bateman suffered a fracture to a bone in his back, during pre-season is still unavaliable.