While Wales face Japan at the Principality Stadium on Saturday with four Cardiff stars included, two more Blue & Blacks will be lining up for their respective countries further afield.
Both Scott Sio and Semisi Paea have been named in the starting line-ups of Samoa and Tonga.
Samoa face Romania in Wakefield and have named two former All Blacks among four test debutants. Sio, who won 69 caps for Australia, also returns after switching allegiance to Manu Samoa last year.
His Cardiff teammate Paea is also on duty in Bucharest tonight, where Tonga take on Romania. Ikale Tahi are led by Dragons centre Fetuli Paea.