|European Challenge Cup quarter-final: Dragons v Blues|
|Venue: Rodney Parade, Newport Date: 4 April, 2015 Kick-off: 12:45 BST|
|Coverage: Live commentary on BBC Radio Wales, Radio Cymru and the BBC Sport website|
Cardiff Blues centre Cory Allen is a doubt for their European Challenge Cup quarter-final at Newport Gwent Dragons on 4 April after dislocating a shoulder.
Allen suffered the injury in their 36-17 Pro12 defeat by Ulster in Belfast.
Full-back Rhys Patchell is also a potential doubt following a head knock on Friday that led to Ulster's Nick Williams being sin-binned.
Allen, 22, has won two Wales caps, as has 21-year-old Patchell.
Patchell spent the night in hospital but Cardiff Blues confirmed he will travel back to Wales on Saturday afternoon.