Friday's European rugby action in the Champions Cup, Challenge Cup and British & Irish Cup - listen to BBC Radio 5 live sports extra and BBC local radio.
Lions and Ireland duo Peter O'Mahony and Tadhg Furlong sign IRFU contracts which will keep them at their provinces until 2021.
Leinster make one enforced change for the return Champions Cup match against Exeter with Josh van der Flier coming in for Rhys Ruddock.
Ireland flanker Rhys Ruddock could miss the start of the Six Nations after tearing a hamstring in Leinster's win over Exeter.
Audio & Video
Watch highlights as Leinster comfortably beat Dragons in the Pro14, scoring eight tries in the process.
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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Commentaries, clips and podcasts
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What's on BBC Sport this week
This week's sport on the BBC includes the third Test of the Ashes series, Bobsleigh and Skeleton World Cup, Premier League football and Sports Personality of the Year.