Saturday's rugby union action in the Champions Cup and Challenge Cup - listen to BBC Radio 5 live sports extra and local radio commentary.
Bath and Wales' Luke Charteris says new rules on eligibility for Wales selection will put players in a "tough position".
Ken Owens returns to captain Scarlets who will be up against several Wales internationals named in the Bath side, including Rhys Priestland.
Bath flanker Francois Louw is suspended for three weeks after pleading guilty to making contact with the eye area.
Audio & Video
Taulupe Faletau says Wales can take confidence from the Lions' second Test victory when they face New Zealand in November.
How to get into rugby union
How to get into rugby union - through the age groups up to the 15-player game or try rugby sevens, which made its Olympic debut in 2016.
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What's on BBC Sport this week
This week's sport on the BBC includes commentary of the European Rugby Champions Cup, Champions League football and the United States Grand Prix.