Port Adelaide duo Trent Dumont and Trent McKenzie will be unable for Saturday's match against Sydney after suffering calf and concussion setbacks respectively.
The Power confirmed on Monday that Dumont has suffered a strain in his right calf, however the former Kangaroo is unlikely to miss an extended period.
The 26-year-old was subbed out of last Thursday's loss to Richmond after suffering the calf complaint.
Dumont has played eight games for Port Adelaide this season, making his club debut in Round 4 against Melbourne.
McKenzie suffered a head knock during a stint in the SANFL against Central Districts and will now be required to follow the AFL's mandatory 12-day concussion protocol period.
The match for Port Adelaide's reserves was McKenzie's first since suffering a knee injury earlier this season, with the earliest return coming in Round 15 against the Suns.
Port Adelaide have confirmed lively forward Orazio Fantasia will return to full training this week as he continues to mend a quad issue.
Duo Scott Lycett (shoulder) and Josh Sinn (groin) remain at least a month away from their respective returns.
