Ireland have made four changes for their World Rugby Under-20 Championship clash against Australia on Thursday (10am).
James Nicholson, Ronan Foxe, Charlie Irvine and Brian Gleeson come into the starting line-up from the team that drew 34-34 with England on Saturday.
Nicholson is named on the left wing as part of the Ireland back three with Henry McErlean and Andrew Osborne, with Hugh Gavin and John Devine forming the midfield partnership.
Sam Prendergast and Fintan Gunne continue in the half-backs for the Pool B clash in Paarl.
In the pack, Paddy McCarthy moves across the front row to loosehead prop, with captain Gus McCarthy at hooker and Foxe in line for his U20s debut at tighthead.
Irvine comes into the side to partner Conor O'Tighearnaigh in the second row, while James McNabney, Ruadhan Quinn and Gleeson make up the back row.
On the bench, Danny Sheahan, George Morris, Fiachna Barrett, Evan O'Connell and Diarmuid Mangan provide the forward options, with scrum-half Jack Oliver set to win his first U20s cap.
Harry West and Rory Telfer complete the match-day squad.
Australia, who opened their campaign with a 46-37 win over Fiji, have made 10 changes to their team with Mason Gordon, Jhy Legg, Lachlan Hooper, Darby Lancaster and David Vaihu retained.
Ireland head coach Richie Murphy said: "It has been a quick turnaround from Saturday but we were able to turn the page positively, and learn from our first outing of the tournament.
"We know the very nature of this World Rugby U20 Championship is that the big games come thick and fast and facing the Junior Wallabies is another huge test for our group. We're looking forward to the challenge."
Meanwhile, World Rugby confirmed that centre Hugh Cooney received a three-match ban for his red card against England.
Cooney, who had to undergo a head injury assessment after the tackle, is likely to see the penalty reduced to two game after he completes the coaching intervention programme.
Ireland U20: Henry McErlean; Andrew Osborne, Hugh Gavin, John Devine, James Nicholson; Sam Prendergast, Fintan Gunne; Paddy McCarthy, Gus McCarthy (capt), Ronan Foxe; Charlie Irvine, Conor O'Tighearnaigh; James McNabney, Ruadhan Quinn, Brian Gleeson.
Replacements: Danny Sheahan, George Morris, Fiachna Barrett, Evan O'Connell, Diarmuid Mangan, Jack Oliver, Harry West, Rory Telfer.
Australia U20: Mason Gordon; Tim Ryan, Henry O'Donnell, David Vaihu, Darby Lancaster; Jack Bowen, Teddy Wilson (capt); Jack Barrett, Max Craig, Massimo De Lutiis; Jhy Legg, Daniel Maiava-Tapusoa; Lachlan Hooper, Ned Slack-Smith, John Bryant.
Replacements: Liam Bowron, Harrison Usher, Nick Bloomfield, Toby Macpherson, Leafi Heka Talataina, Klayton Thorn, Harry McLaughlin-Phillips, Taj Annan.
Follow a live blog of Ireland v Australia on RTÉ Sport Online and the RTÉ News app from 10am on Thursday
