Mason Grady and Ben Thomas will miss tonight’s Guinness Pro14 clash with Connacht after they were unable to travel to Ireland.
Government regulations in Ireland stipulate elite sportspeople must test for Covid-19 within 72 hours of arrival in the country.
Inconclusive results meant there was no time for Grady and Thomas to return appropriate test results. They have therefore dropped out of the travelling party.
The withdrawals see Harri Millard come into the starting line-up with Max Llewellyn and Dan Fish coming onto the replacements bench.
Cardiff Blues: Matthew Morgan, Owen Lane, Harri Millard, Rey Lee-Lo, Aled Summerhill; Jason Tovey, Lloyd Williams; Rhys Carré, Liam Belcher, Dmitri Arhip, Seb Davies, Rory Thornton, Shane Lewis-Hughes, Ellis Jenkins, Josh Turnbull (capt).
Replacements: Kirby Myhill, Corey Domachowski, Keiron Assiratti, Ben Murphy, Gwilym Bradley, Jamie Hill, Max Llewellyn, Dan Fish