Leinster head coach Leo Cullen is unsure how long fly-half Johnny Sexton will be out of action.
Exeter Chiefs were made to work hard for their third European Champions Cup win in a row, with Rob Baxter relieved to get over the line.
Rob Baxter's Exeter Chiefs survived a late scare to defeat Sale Sharks and remain firmly on track for the Champions Cup quarter-finals.
There were seven tries in Leinster's 43-16 European Champions Cup win over Northampton Saints as they made it 10 victories from 10.
Bath were no match for a classy Clermonth Auvergne in Friday's European Rugby Champions Cup clash.
Leone Nakarawa has been linked with a return to Glasgow Warriors after Racing 92 announced they had sacked their star lock on Friday.
La Rochelle's Pierre Bourgarit learned his fate on Wednesday after being sent off for eye-gouging Sale Sharks' Tom Curry.
Sale Sharks saw off a La Rochelle side who were let down by Pierre Bourgarit, as the English team sealed a first European win of the season.
Ospreys were no match for Saracens on Saturday, while Exeter Chiefs were among the other European Champions Cup winners.
Ulster made it two wins from two in this season's European Champions Cup by overcoming Pool 3 rivals Clermont Auvergne.