The Blues have lost All Blacks Jerome Kaino and Charles Piutau for the remainder of the Super Rugby season to injury.
Loose forward Kaino has a compound dislocation of his ring finger and will be out for eight weeks, while fullback Piutau will be out for six weeks with ligament damage to his knee.
There were other casualties in the Blues' win over the Western Force on Saturday.
Flanker Luke Braid has suffered another concussion and is out for an indefinite period.
The Blues will play the Rebels at 9.40pm this Friday
