Tom Stewart is set for a stint on the sidelines after coach Chris Scott confirmed the two-time All Australian defender will have surgery on Monday.
Stewart injured his foot at training on Thursday night and was a late withdrawal ahead of Geelong's 14-point victory against St Kilda.
“He is going to have surgery on that Lisfranc ligament injury on Monday,” Geelong coach Chris Scott said post-game.
Scott refused to rule Stewart out for the remainder of the season and is hopeful he could return should the Cats reach the Grand Final again this year.
“Probably the last game of the season is the hope, so we’ve got a bit of work to do between now and then,” he said.
Stewart has been a standout for the Cats this season averaging 24 disposals and nine marks per game.
Scott acknowledged the loss of Stewart is a devastating one on the eve of finals.
“He has just been superb for us and in my mind our best player, so that’s a big loss but history is littered with examples of teams who have overcome adversity like that.
“I think it’s just a fact in footy and it has been this way for a long time in that you need a little bit of luck, but you can guarantee at some point you are going to get some back luck, so we just need to find a way to respond.”
Geelong will close out their home and away season against Melbourne next week.