The Irish province are in Wales themselves on Friday when they visit the Blues. Dai Young's side are in fifth place at the moment but are only five points behind second and do have a game in hand over all the teams around them.
The Scarlets and the Dragons are in sixth and seventh and they have home ties against Benetton Treviso and Leinster respectively this weekend.
With just five rounds of action remaining there are still some cracking Welsh derbies to be played before the end of the campaign.
The Blues still have away derby fixtures at Ospreys (Saturday April 2), Dragons (Friday April 29) and Scarlets (Friday May 6) and Dragons and Ospreys will also meet at Rodney Parade on Friday April 15.