There's a repeat of one of last season's semi-finals at Thomond Park.
Munster have recalled their international contingent for the visit of reigning champions Saracens.
Waterford's Jack O' Donoghue is named among the replacements for Munster.
Kick off in Limerick is at 5.30 pm.
🔥🔥🔥
Some start to the Champions Cup campaign for @KeithEarls87!
Check out some of his highlights ahead of #MUNvSAR ⬇️ #SUAF 🔴 pic.twitter.com/vbu4MOgAik— Munster Rugby (@Munsterrugby) December 7, 2019
Seven tries helped Leinster to a comprehensive 43-point to 16 bonus-point win over Northampton in Pool One of the Heineken Champions Cup earlier.
Leinster led 19 points to 16 at half-time, but crossed the whitewash four time in the second half.
However, Leo Cullen's side lost Johnny Sexton to injury early in the second half.
ALL OVER! A HUGE WIN. A try from Ed Byrne as the clock hits red, converted by Ross, sees out a massive win at Franklin's Gardens. We'll see you next week at Aviva Stadium as we do it all again. #NORvLEI #JoinTheRoar pic.twitter.com/cPdZ5TfyrM
— Leinster Rugby (@leinsterrugby) December 7, 2019