Both matches kick off at 7.15pm.
Ospreys: C Lewis, R Bayliss, S Soul, A Beck, M Davies, D Biggar, A Buselli, G Jenkins, J Beddow, R Thomas, R Hnyda, S Williams, J Tipuric, B Howe, R Pitman (c)
Replacements: T Knoyle, M Jarvis, S Hancock, A Bale, J Vaughan, D Ronan, A Minifey
Blues: J Loxton, H Allen, L Fear, P Williams (c), J Xiberas, J Deacon, R Downes, T Price, R Williams, S Andrews, D Partridge, G Capelin, K Dacey, J Thomas, L Mills
Replacements: C Fish, B Lee, M Lewis, A Toomey, R James, L Williams, C Llewellyn
Dragons: J Burgess, G Dare, B Sweet, C Wannell, N Preece, D Ellis, D Jones, A Coundley (c), C Fillier, S Maguire, M Allen, A Sweet, G Paterson, E Cracknell, S Pailor
Replacements: N Buck, G Young, R Price, J Thomas, J Leadbeater, K Price, J Tibbs
Scarlets: G Griffiths, M Lemon, R Williams, J Harries, R Lewis, D Newton, M Gibson, M Williams, R Guest (c), S Gardiner, C Jenkins, H Boot, I Davies, L Owen, G Flynn.
Replacments: T James, D Etteridge, T Wilson, S Thomas, N Jones, N Kavanagh, A Bishop
