Ospreys take on Toulouse, while Scarlets are at home to Exeter.
KO for both games is at 13:35
More top news
Cold weather is again on the way for the UK. Colder conditions will spread south, bringing a mixture of sunny spells and snow showers
Siarad cymraeg McBusted? Well you will be by April! Pop band get a lesson in Welsh ahead of their Cardiff gig
Clear spells across southern and eastern parts will lead to a chilly night with a local frost possible