North Melbourne will wait on advice from specialists before making a call on the availability of Jack Ziebell for the remaining rounds of the season.
The captain was withdrawn from the North team that played Hawthorn on Sunday with a foot injury - the same complaint that kept him out of the side's Round 18 clash with Essendon.
While there's a possibility he could still play against St Kilda on Sunday, the club will defer to specialists to ensure no further damage could be done.
Jarrad Waite could return if he gets through training this week and shows he has overcome a calf issue.
Majak Daw has been ruled out for the rest of the season with North running out of time to get him back before the end of the season because of a foot injury.
For more NMFC injury news and the full injury list, visit the Anytime Fitness Health Hub