The 29-year-old returned from an adductor injury against Glenelg at Alberton on Saturday morning but injured his hamstring during the game.
He will undergo scans on Tuesday before the club makes a further assessment.
His cousin Brad was the only injury reported from Sunday’s win over Brisbane, with the Power’s vice-captain suffering a cut above his eye late in the match.
Match report
Jay Schulz was also taken from the field after a heavy knock earlier in the match, but returned to kick two goals.
Both will be available to play in Balfours Showdown XXXV on Sunday according to the club’s high performance manager Darren Burgess.
He also confirmed no injury cloud surrounds Dom Casissi, who returned from a hamstring injury but was substituted from the game at three-quarter-time.
“Brad and Schulzy both had headaches after the game but it’s nothing to worry about,” Burgess told portadelaidefc.com.au.
“They’ll both be fine for the weekend.
“We also substituted Dom Cassisi from the game, but that was a management decision, not an injury concern.”
Daniel Stewart will be available to play for North Adelaide this weekend after recovering from a hip injury.
Port Adelaide injury list as of Monday 28 July
Brad Ebert – cut above eye (available)
Daniel Stewart – hip (available)
Brett Ebert – hamstring (TBC)
Jarrad Redden – hip (season)
