Biarritz number eight Raphaël Lakafia is out for four to six weeks after a training ground incident led to a mass brawl.
English and French clubs are to form a new breakaway competition next season after talks about continuing the Heineken Cup ended.
Stade Français moved to the top of the Top 14 standings after registering a 38-3 victory over Biarritz in Paris on Friday.
With the Rugby Championship taking a week off after two pulsating rounds, our focus this week is on the best of the action from France....
Veteran French internationals Yannick Jauzion and Jérôme Thion have announced they are calling time on their respective careers.
The Top 14 transfer window closed at midnight on Saturday with a handful of last-minute announcements made in France.
Two of rugby's long-standing heavyweights clash on Saturday as Heineken Cup holders Leinster tackle European mainstays Biarritz.
Wales fly-half James Hook racked up 23 points as Perpignan defeated Biarritz 33-28 at the Stade Aimé-Giral on Sunday.
Biarritz hooker Benoit August is planning to retire at the end of the season, the Top 14 heavyweight side announced on Saturday.
Biarritz have placed their whole first-team squad in quarantine for a week after an outbreak of mumps.
Mike Tindall returns to the Gloucester starting line-up to face Biarritz Olympique in the Amlin Challenge Cup quarter-final.
Biarritz battled to a scrappy 33-16 Top 14 win over Grenoble at Parc des Sports d'Aguilera in a result that moves them eighth in the table....
Grenoble will try to revive their fading Top 14 play-off hopes when they visit Parc des Sports d'Aguilera in Biarritz on Friday.
The local passion surrounding Friday's ever-fiery Basque derby between Bayonne and Biarritz masks deeper concerns.
Biarritz scrum-half Dimitri Yachvili has been cited for repeatedly stamping on Racing Métro centre Henry Chavancy last Saturday.
Stade Français held on for a valuable Top 14 win over Bordeaux-Bègles on Saturday despite seeing skipper Sergio Parisse sent off.
On a day of by upsets, Top 14 leaders Toulon were thrashed 41-0 by Bordeaux-Bègles while Toulouse lost in Agen.