The Ospreys will be without in-form openside flanker Justin Tipuric for their trip to face Treviso in the final Heineken Cup game of both's season.
Sam Lewis will instead start in the number seven jersey for Sunday's match as Tipuric is not in the matchday 23, which was announced on Friday.
Half-back pair Kahn Fotuali'i and Dan Biggar remain in tandem for what will be a testing afternoon in Italy against their PRO12 rivals.
Richard Hibbard is also not in the matchday squad for the game as injury rules him out so Scott Baldwin gets a start in the hooking jersey.
Treviso meanwhile will be buoyed for how they held Toulouse for a long spell in last week's Pool fixture and are boosted by the return of Italian international Luke McLean to their full-back shirt.
Alberto Sgarbi also returns at centre, replacing Andrea Pratichetti, while Kristopher Burton and Edoardo Gori are back in the half-backs, taking over from Luca Morisi and Tobias Botes.
Treviso: 15 Luke McLean, 14 Ludovico Nitoglia, 13 Tommaso Benvenuti, 12 Alberto Sgarbi, 11 Giiulio Toniolatti, 10 Kristopher Burton, 9 Edoardo Gori, 8 Robert Barbieri, 7 Alessandro Zanni, 6 Paul Derbyshire, 5 Francesco Minto, 4 Antonio Pavanello, 3 Lorenzo Cittadini, 2 Giovanni Maistri, 1 Michele Rizzo.
Replacements: 16 Enrico Ceccato, 17 Alberto de Marchi, 18 Ignacio Fernandez Rouyet, 19 Marco Fuser, 20 Valerio Bernabo, 21 Dean Budd, 22 Fabio Semenzato, 23 Andrea Pratichetti.
Ospreys: 15 Richard Fussell, 14 Thomas Grabham, 13 Tom Isaacs, 12 Andrew Bishop, 11 Eli Walker, 10 Dan Biggar, 9 Kahn Fotuali'i, 8 Joe Bearman, 7 Sam Lewis, 6 Jonathan Thomas, 5 James King, 4 Lloyd Peers, 3 Adam Jones, 2 Scott Baldwin, 1 Duncan Jones.
Replacements: 16 Matthew Dwyer, 17 Ryan Bevington, 18 Campbell Johnstone, 19 Ian Gough, 20 George Stowers, 21 Rhys Webb, 22 Matthew Morgan, 23 Jonathan Spratt.
Date: Sunday, 20 January
Venue: Stadio Di Monigo
Kick-off: 16:00 (15:00 GMT)
Referee: Greg Garner (England)
Assistant referees: Luke Pearce (England), Paul Dix (England)
Television match official: Trevor Fisher (England)