|Guinness Pro14: Cardiff Blues v Dragons|
|Venue: Cardiff Arms Park Date: Friday, 21 Dec Kick off: 19:35 GMT|
|Coverage: Live commentary on BBC Radio Wales, Radio Cymru That the BBC Sport website and Program|
Dragons will probably be without powerful Backrower Ollie Griffiths for their derbies against Cardiff Blues, Ospreys and Scarlets.
Even the Wales 23, suffered a knee injury from the European Challenge Cup defeat at Northampton on 8 .
Yet, veteran Wales hooker Richard Hibbard is expected back for this particular game.
Fit-again wing Jared Rosser could joins hibbard and back-rower Harrison Keddie for the Welsh derby of the period.
But a tear that requires surgery has ruled outside fly half Arwel Robson, who isn’t expected to go back before the latter stages of.
Griffiths, that is able to play across the back-row, is outside for up to fourteen days and missed the decreasing rematch of last weekend against Saints.
After facing Cardiff Blues, Dragons host Ospreys on Sunday and are in Scarlets on Saturday, 5 January.