|Blues v Ospreys; Dragons v Scarlets|
|Venue: Millennium Stadium, Cardiff Date: Saturday, 25 April|
|Kick offs: 14:30 BST and 16:45 BST Coverage: Blues v Ospreys live on Scrum V Live on BBC Two Wales, BBC Radio Wales, BBC Radio Cymru, online, mobile, the BBC Sport app and Connected TV. Dragons v Scarlets live on S4C, BBC Radio Wales, BBC Radio Cymru, online, mobile, the BBC Sport app and Connected TV. Live text commentary on both matches on BBC Sport website.|
Scarlets head coach Wayne Pivac says their Judgement Day match against Newport Gwent Dragons is a chance for Rhys Priestland to impress Wales coach Warren Gatland ahead of the World Cup.
The Wales fly-half, 28, will make his first start for Scarlets since January at the Millennium Stadium on Saturday.
"We felt this big stage, big occasion was made for Rhys and I think he'll go well," said Pivac.
"It would be a great stage for him to have a big game."
Gatland will be at the Millennium Stadium as Priestland and his Scarlets team-mates vie for a place in the Pro12's top six, which would secure European Champions Cup qualification for next season.
Priestland will be eager to impress Wales' head coach, with rival fly-halves Dan Biggar of Ospreys and Gareth Anscombe of Cardiff Blues lining up against each other in the day's earlier match.
The 34-cap Scarlets player's last Wales start came back in November 2014 against Fiji.
But Pivac believes the magnitude of Judgement Day will suit Priestland, who will join Bath at the end of the season.
"It's going to be in front of a big crowd and I guess it's the closest at our level we will get to where he wants to be, and where Warren wants him to be," added Pivac.
"The World Cup squad is going to have an enlarged squad to start with.
"Players will be playing for places in that squad initially and then, from there, trying to force their way in to the final squad."