Blues' director of rugby David Young has no doubts about his surprise selection for what is another vital match for his side. He said,
"Chris has been making steady progress for the Cardiff club team and done particularly well for Wales under-21s. Scott Johnson is among those suitably impressed by him and we have decided that he deserves a chance with the Blues before the end of the season."
Rhys Williams also returns for the Blues after shaking off a leg injury. He will play at outside centre alongside Tom Shanklin with Nick Macleod continuing at full-back. One doubt in the pack is at tight-head prop where Gethin Jenkins is due for a scan on a shoulder injury.
Team: Nick Macleod; Chris Czekaj, Rhys Williams, Tom Shanklin, Craig Morgan; Nick Robinson, Ryan Powell; John Yapp, Gareth Williams, Gethin Jenkins/Ben Evans, Craig Quinnell, Robert Sidoli, Robin Sowden-Taylor, Kort Schubert, Martyn Williams (captain)
Replacements: Ben Evans/Nathan Llewellyn, Rhys Thomas, Nathan Budgett, Nathan Thomas, Maama Molitika, Dean Dewdney, Tristan Davies/Jonny Vaughton
Referee: David Changleng (Scotland)