David Young has named a squad of 25 from which the team to play the Ospreys on Sunday will be selected.
The head coach said, "It has been an unusual week with several players involved with Wales and the Wales under-21 set-up. Most of our injury worries have been resolved but we will not announce the final line-up until Sunday morning."
David Young has also sent out a message of thanks to the supporters who have organised three official coaches to travel to Swansea for the match plus the many other fans who are making their way independently.
He said, "With six matches to go everything is in the melting pot for at least three and probably four of the Welsh regions and we are due to play not only the Ospreys but also the Dragons and the Warriors on their own grounds in the weeks ahead. Support like what we are expecting this weekend is marvellous and all the team appreciate it."
Blues squad v the Ospreys:
Backs: Donavan van Vuuren, Nick Walne, Dean Dewdney, Jonny Vaughton, Jamie Robinson, Matt Allen, Pieter Muller, Nick Robinson, Nick Macleod, Ryan Powell, Andrew Moore
Forwards: Ken Fourie, John Yapp, Ben Evans, Darren Crompton, Andrew Lewis, Rhys Thomas, Craig Quinnell, Heino Senekal, Jim Brownrigg, Andy Moore, Matt Cockbain, Dan Baugh, Nathan Thomas, Robin Sowden-Taylor