Sydney captain Callum Mills is set to miss Saturday's clash with Richmond with a leg niggle, while Brisbane veteran Dayne Zorko will be sidelined for another six weeks with an ongoing quad injury.
Zorko has missed the past fortnight with a quad niggle, and fresh scans have revealed more damage than the initial injury.
"It's a concern, because he's having trouble with a quad injury," Brisbane coach Chris Fagan said on Thursday.