The Reds will definitely be without captain Scott Higginbotham for their next two matches, but Lukhan Tui's availability remains unclear.
La Rochelle are a formidable force on home soil, but suffered a rare defeat at Stade Marcel-Deflandre as Toulon came from behind to win.
Saracens fell victim to a tremendous Leicester Tigers performance on Sunday, while there was a rare win for London Irish against Worcester.
A Jarrod Evans penalty on the stroke of half-time and Owen Lane's converted try gave Cardiff Blues a hard-fought win at Zebre.
After Owen Farrell and Ryan Wilson appeared to be involved in a pre-match scuffle at Murrayfield, Six Nations Rugby will investigate.
Eddie Jones apologised to England fans after their Six Nations Grand Slam hopes went up in smoke at Murrayfield against an inspired Scotland