
Munster have a must-win clash with Castres (pr: cast) if they are to guarantee progression to the knock-out stages of the Investec Champions Cup.
The Thomond Park fixture gets underway at 5.30.
Before that, Leinster go in search of a top-two seeding away to Bayonne (pr: bye-on) from 3.15pm Irish time.
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While in the Challenge Cup, Ulster round off the pool stages by welcoming Stade Francais to Belfast from 1.
And Connacht will secure a place in the knockout stages if they beat Montauban at Dexcom Stadium, where kick-off is at 8.








