Ospreys: Jack Walsh; Daniel Kasende, Evardi Boshoff, Keiran Williams, Keelan Giles; Dan Edwards, Reuben Morgan-Williams; Gareth Thomas, Sam Parry, Tom Botha, James Fender, James Ratti, Tristan Davies, Jac Morgan (capt), Morgan Morse.
Replacements: Dewi Lake, Garyn Phillips, Ben Warren, Will Spencer, Lewis Lloyd, Kieran Hardy, Owen Williams, Iestyn Hopkins.
Cardiff: Cam Winnett; Josh Adams, Harri Millard, Ben Thomas, Gabriel Hamer-Webb; Callum Sheedy, Johan Mulder; Corey Domachowski, Liam Belcher (capt), Keiron Assiratti, Ben Donnell, Teddy Williams, Alex Mann, James Botham, Taulupe Faletau.
Replacements: Evan Lloyd, Danny Southworth, Rhys Litterick, Rory Thornton, Alun Lawrence, Thomas Young, Aled Davies, Rory Jennings.
Referee: Ben Connor (WRU)
Assistant referees: Ben Whitehouse & Ben Breakspear (WRU)
TMO: Aled Griffiths (WRU)
