Injured All Blacks great Dan Carter will miss Racing 92's European Champions Cup opener against Munster on Sunday.
Team news as Newcastle Falcons host FC Grenoble in Sunday's European Rugby Challenge Cup fixture at Kingston Park (15:00 BST).
Munster will retire their number eight jersey in memory of Anthony Foley for Saturday's Champions Cup game against Glasgow Warriors at Thomond Park.
Team news and previews for all of Saturday and Sunday's European Champions Cup and Challenge Cup matches.
Team news as Toulouse host Wasps in Sunday's European Rugby Champions Cup fixture at Stade Ernest-Wallon (15:15 BST).