The Brumbies have made two changes to the team that beat the Rebels for their Super Rugby match against the Bulls in Pretoria on Saturday.
Andrew Smith and Ben Alexander have been called back into the starting side with rookie tourists Tevita Kuridrani and Ruaidhri Murphy moving back to the bench.
Head Coach Jake White said his young side would need to show maturity beyond its years, with just nine of the 22 players named having played against the Bulls previously.
"This is a big occasion for a young side like this, the Bulls crowd is one of the most vocal of the Super Rugby competition so it will be a huge test for them to block that out," White said.
"We've had a good week of preparation on the High Veldt and recovered nicely from the flight over so there won't be any excuses there.
"This will be our toughest battle of the year. The Bulls are a strong team with Springboks right across the park. But we will be in this match to the end, it should be a fantastic game of rugby."
It will be a special occasion for fly-half Christian Lealiifano, who knocks up his 50th Brumbies Rugby cap in Pretoria.
Skipper Ben Mowen will also reach 50 caps having previously represented the NSW Waratahs and the Queensland Reds.
1. Ben Alexander,2. Stephen Moore,3. Dan Palmer,4. Scott Fardy,5. Sam Carter,6. Ben Mowen (c),7. Michael Hooper,8. Fotu Auelua,9. Nic White,10. Christian Lealiifano,11. Joe Tomane,12. Pat McCabe,13. Andrew Smith,14. Henry Speight,15. Jesse Mogg
Replacements:16. Anthony Hegarty,17. Ruaidhri Murphy,18. Peter Kimlin ,19. Ita Vaea,20. Ian Prior,21. Robbie Coleman ,22. Tevita Kuridrani