All Black Chris Jack will miss Saracens game against Leeds Carnegie this Sunday at Vicarage Road after the second row was ruled out for the rest of the season after suffering a hand injury in Saturday's EDF Energy Cup semi-final against the Ospreys.
The 29-year-old All Black second row fell heavily in the match and sustained damaged tendons and as a result he has already undergone surgery.
The injury will rule him out of the remainder of Saracens Guinness Premiership and Heineken Cup campaigns.
Saracens Director of Rugby Alan Gaffney said: "It's a blow for the club and more importantly for Chris who has quickly settled in England and has been producing some very good performances for us, but it's something that we have to deal with.
"Chris has made a great impact since he arrived at the club and I know that he will still play an active role in supporting the guys. Even though he won't be able to get out on the pitch, with his knowledge and experience he still has a very important role to play for us."