Bit of a mismatch of experience levels in tonight's game...
Gloucester Rugby: 15. David Halaifonua; 14. Henry Purdy, 13. Henry Trinder, 12. Mark Atkinson, 11. Ollie Thorley; 10. Billy Burns, 9. Callum Braley; 1. Cameron Orr, 2. Richard Hibbard, 3. Fraser Balmain; 4. Ed Slater, 5. Mariano Galarza; 6. Freddie Clarke (capt), 7. Will Safe, 8. Ben Morgan. Replacements: 16. Henry Walker, 17. Paddy McAllister, 18. Gareth Denman, 19. Callum Allen, 20. Gareth Evans, 21. Ben Vellacott, 22. Matt Scott, 23. Tom Hudson.
Ospreys: 15 Cai Evans; 14 Dafydd Howells, 13 Joe Thomas, 12 James Hook, 11 Jay Baker; 10 Luke Price (Capt), 9 Reuben Morgan-Williams; 1 Gareth Thomas, 2 Scott Otten, 3 Alex Jeffries, 4 James Ratti, 5 Lloyd Ashley, 6 Guy Mercer, 7 Will Jones, 8 Morgan Morris. Replacements: 16 Ifan Phillips, 17 Rowan Jenkins, 18 Rhodri Jones, 19 Kieran Martin, 20 Josh Cole, 21 Matthew Aubrey, 22 Callum Carson, 23 Dewi Cross.