Ospreys take on Toulouse, while Scarlets are at home to Exeter.
KO for both games is at 13:35
More top news
The new MP for Aberavon has urged action to avoid Labour's leadership contest becoming a narrow choice between just two candidates
Families are cutting back on food or on heating their homes because children's benefits are not in line with the cost of living.
The Ospreys coach says his inexperienced side will go into Saturday’s Pro 12 semi-final without fear after their impressive league campaign.