This is how the teams will line up:
Newport Gwent Dragons
Martyn Thomas, Aled Brew, Tom Riley, Ashley Smith, Richard Fussell, James Arlidge, Wayne Evans, Hugh Gustafson, Tom Willis (C), Peter Bracken, Robert Sidoli, Luke Charteris, Danny Lydiate, Gavin Thomas, Hoani MacDonald
Replacements: Steve Jones, Gethin Robinson, Adam Jones, Lewis Evans, Jason Tovey, Matthew Watkins, Danny Lee
Scarlets
Daniel Evans, Lee Williams, Sean Lamont, Rob Higgit, Mark Jones (C), Stehen Jones, Martin Roberts, Iestyn Thomas, Matthew Rees, Deacon Manu, Lou Reed, Dominic Day, Simon Easterby, Dafydd Jones, David Lyons
Replacements: Phil John, Ken Owens, Vernon Cooper, Richie Pugh, Tavis Knoyle, Rhys Priestland, Gareth Maule