SaintÉtienne, :Australia on Sunday made a late change to their bench for their final Pool C clash against Portugal as Samu Kerevi replaced Carter Gordon.
Australia did not say why Gordon had been replaced.
Kerevi had started Australia's three previous pool stage matches but was originally dropped from the matchday 23, with head coach Eddie Jones explaining he had been below par.
"Samu (Kerevi) has probably been a little bit off, he's had a tough run-in to the World Cup coming back from (an) ACL (injury), two hamstring injuries," Jones had said on Friday.
"He just hasn't been as sharp as we would like him to be."
Australia and Portugal teams for the Rugby World Cup match in Saint Etienne on Sunday (kick-off 1545 GMT):
Australia (15-1):
Andrew Kellaway; Mark Nawaqanitawase, Izaia Perese, Lalakai Foketi, Marika Koroibete; Ben Donaldson, Tate McDermott; Rob Valetini, Fraser McReight, Tom Hooper; Richie Arnold, Nick Frost; James Slipper, David Porecki (capt), Angus Bell
Replacements: Matt Faessler, Blake Schoupp, Pone Fa'amausili, Rob Leota, Josh Kemeny, Issak Fines-Leleiwasa, Carter Gordon, Suli Vunivalu
Coach: Eddie Jones (AUS)
Portugal (15-1)
Nuno Sousa Guedes; Raffaele Storti, Pedro Bettencourt, Tomas Appleton (capt), Rodrigo Marta; Jeronimo Portela, Samuel Marques; Thibault de Freitas, Nicolas Martins, David Wallis; Martim Belo, Jose Madeira; Diogo Hasse Ferreira, Mike Tadjer, David Costa
Replacements: Francisco Fernandes, Duarte Diniz, Francisco Bruno, Steevy Cerqueira, Rafael Simoes, Joao Belo, Joris Moura, Manuel Cardoso Pinto
Coach: Patrice Lagisquet (FRA)
