The Socceroos started the tournament with a 4-1 loss to reigning champions France but did cause an early scare by scoring first.
Tunisia, meanwhile, gave Denmark a stern test in a 0-0 draw that showcased their ability to compete in Qatar.
This game has always been earmarked as a must-win for both teams and they’ll likely throw everything at trying to secure a crucial three points in a competitive Group D.
MORE: World Cup Group D fixtures, results and standings
Australia vs. Tunisia lineups
The Socceroos make just one change as coach Graham Arnold largely keeps faith with the side beaten 4-1 in their opening match against France.
Nathaniel Atkinson, who struggled against France, is out injured, with Fran Karacic coming in to replace him on the right side of defence.
But there is still no place for No. 10 Ajdin Hrustic, who sat out the France game with a minor injury. It looks like Arnold will retain a 4-5-1 formation, although that could revert to a 4-3-3 as they chase goals in this game.
Tunisia, meanwhile, also make just the one change after their opening draw with Denmark. Naim Sliti takes over from Anis Ben Slimane as one of two players - along with captain Youssef Msakni - providing support up top for striker Issam Jebali.
Star player Wahbi Khazri, who wasn’t used against Denmark, is on the bench today as is Manchester United midfielder Hannibal Mejbri.
Australia confirmed starting 11
Australia (4-1-4-1, right to left): 1. Ryan (GK) — 5. Karacic, 19. Souttar, 4. Rowles, 16. Behich — 13. Mooy — 23. Goodwin, 22. Irvine, 14. McGree, 7. Leckie — 15. Duke
Injuries: Atkinson Suspensions: None
Tunisia confirmed starting 11
Tunisia (3-4-2-1, right to left): 16.Dahmen (GK) — 6. Bronn, 4. Meriah, 3. Talbi — 20. Drager, 17. Skhiri, 8. Mejbri, 24. Abdi — 23. Sliti, 10. Khazri — 9. Jebali
Injuries: None Suspensions: None
