Levi Greenwood's continuing to struggle with a knee injury that could keep him out of Collingwood's opening round clash with Hawthorn.
The midfielder had surgery in December to address a medial ligament complaint he sustained in round 20 last season, and has been absent from the training track in recent weeks.
The Magpies expected he would be back in training by the end of January, but the 29-year-old's recovery has not gone as well as hoped.
He will sit out their second JLT Community Series game against Western Bulldogs on 10th March and faces a race against time to appear in round one a fortnight later.
Jamie Elliott (ankle), Daniel Wells (achilles) and Alex Fasolo (shoulder) remain hopeful of facing the Bulldogs.
And defenders Jeremy Howe and Darcy Moore are expected to play in Friday night's VFL squad intraclub at Olympic Park.
The pair have been on reduced loads in recent weeks after developing calf and Achilles soreness respectively.
Midfielder Adam Treloar is another who is expected to face the Bulldogs in Moe, despite undergoing scans on Monday.
Collingwood are 1/250 for a top eight finish this season.
Meanwhile, Fremantle hope young ruckman Sean Darcy is ready for action after a calf injury.
Darcy is expected to feature in Sunday's scratch match against West Coast, and could play alongside mentor Aaron Sandilands.
The duo were partnered together for the first time in round 15 last year but it was a short-lived experiment after Sandilands suffered a season-ending hamstring injury.
Midfielder Stephen Hill won't play against the Eagles, having tweaked his calf while on the comeback trail from a quad issue.
Fremantle are 4500/1 to win the Grand Final. The Dockers are 500/1 to finish in the top eight.
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