Judgement Day double-header from the Principality Stadium in Cardiff.
Ospreys 19-36 Cardiff: Keiran Williams try puts Ospreys ahead, before Alex Mann and Gabriel Hamer-Webb doubles give Cardiff handy half-time lead. Ospreys' Will Spencer and Kieran Hardy narrow gap, but late penalty try and Hamer-Webb's hat-trick seal Cardiff win.
Dragons 23-31 Scarlets: Henry Thomas try opens scoring for Scarlets, with Jared Rosser replying for Dragons. Ashton Hewitt and fellow Dragons wing Rosser cross in quick succession after the break, but Alec Hepburn, Vaea Fifita and Blair Murray claim tries for Scarlets.
Cardiff lift the Welsh Shield as top dog in games between the four Welsh regions during the United Rugby Championship season.
Live Reporting
Matt Lloyd and Ceri Coleman-Phillips
Postpublished at 16 mins
16 mins
Dragons 0-0 Scarlets
Blair Murray and Macs Page combine down the right as Scarlets threaten again.
No you don't Ifan, and you also don't want to slip over behind your own try line when trying a sidestep as just happened to Dragons scrum-half Rhodri Williams.
Scarlets have a scrum five metres out after Dragons were caught trying to be too clever.
Just a reminder, Scarlets ended a three-game losing run with victory against Ospreys last month - and with four games remaining are still targeting both the URC play-offs.
Connacht's bonus point at Stormers means they have slipped to 12th and are six points off the play-off places.
Their other remaining games look pretty daunting - they host Leinster before flying to South Africa to face Lions and Sharks.
What they saypublished at 17:30 British Summer Time 19 April
17:30 BST 19 April
Dragons v Scarlets (17:30 BST)
Dragons head coach Filo Tiatia: "Scarlets are a good side and I enjoyed watching both derby games (with Ospreys) back-to-back.
"We've had a good look at Scarlets, and we've had a reminder of New Year's Day and some of the areas we weren't great at, so we are better.
"They are a transitional team, they feed on scraps with good athletes right across the park.
"They have several overseas players and international experience in that team, so they are a strong side."
Scarlets head coach Dwayne Peel: "It's undoubtedly an important game in of our league ambitions. The Dragons will be ultra-competitive. They have some top operators and they will want to get amongst us.
"The fact that both games are important for league positions adds a bit of added spice to the Judgement Day occasion.
"For our younger players who haven't played at the stadium before, it will be a special day for them and a great experience."
Rogers returns for Scarletspublished at 17:29 British Summer Time 19 April
17:29 BST 19 April
Dragons v Scarlets (17:30 BST)
Image source, Huw Evans Picture Agency
Wales wing Tom Rogers is back for Scarlets following a thumb injury suffered during the Six Nations.
His return sees Macs Page switch from wing to outside centre.
Hooker Marnus van der Merwe and lock Alex Craig also return in three personnel changes from the side that lost to Ospreys in the Challenge Cup.
Scarlets Blair Murray; Tom Rogers, Macs Page, Eddie James, Ellis Mee; Ioan Lloyd, Gareth Davies; Alec Hepburn, Marnus van der Merwe, Henry Thomas, Alex Craig, Sam Lousi, Vaea Fifita, Josh Macleod (capt), Taine Plumtree.
Replacements: Ryan Elias, Sam O'Connor, Sam Wainwright, Jac Price, Jarrod Taylor, Archie Hughes, Joe Roberts, Ioan Nicholas.
Dragons duo returnpublished at 17:25 British Summer Time 19 April
17:25 BST 19 April
Dragons v Scarlets (17:30 BST)
Image source, Huw Evans Picture Agency
Dragons welcome back official co-captains Ben Carter and Angus O'Brien from long-term injuries but centre Aneurin Owen will lead the side on this occasion.
Wales centre Scott Williams will be making his first Dragons start against his former side. Williams is on permit from Pontypool.
Carter returns to action for the first time in almost six months after recovering from knee and ankle injuries.
The lock sustained a problem in his left knee while training with Wales at the end of October that required surgery.
The return of the 24-year-old was then delayed by a long-standing ankle issue which also needed an operation.
Fly-half O'Brien has also been missing since suffering a fractured thumb in January. Owen has led the side in the duo's absence and will continue in that leadership role.
O'Brien lines up as one of four backline changes, with wing Jared Rosser replacing the injured Rio Dyer and Ewan Rosser coming in for unavailable full-back Huw Anderson
Flanker Taine Basham and prop Dylan Kelleher-Griffiths start, with Harri Keddie and Rodrigo Martinez ruled out by injury.
Dragons:Ewan Rosser; Ashton Hewitt, Aneurin Owen (capt), Scott Williams, Jared Rosser; Angus O'Brien, Rhodri Williams; Dylan Kelleher-Griffiths, Elliot Dee, Paula Latu, Ben Carter, Ryan Woodman, Shane Lewis-Hughes, Taine Basham, Aaron Wainwright.
Replacements: Brodie Coghlan, Rhodri Jones, Chris Coleman, Barny Langton-Cryer, Dan Lydiate, Dane Blacker, Will Reed, Joe Westwood.