All Blacks star suffers new injury setback
All Blacks star suffers new injury setbackSHARE
He was forced off with a knee problem after just 24 minutes of the game against Clermont.
Cruden, 29, who only signed up for Top 14 duty late last year, had already been sidelined by a right knee injury throughout December.
He was replaced on Sunday by young centre Yvan Reilhac.