Collingwood have hit the training track at the MCG for their main closed session of the week in the lead-up to Saturday's AFL grand final replay against St Kilda.

Media were invited to film 10 minutes of the warm-up but the remainder of the session was held behind locked doors.

The Magpies have several selection dilemmas heading into the match, with the poor form of small forward Leon Davis sure to put him under the selection spotlight.

Davis, who has struggled to produce his best in big games, gathered just six possessions last week, although his dazzling goal in the last quarter may prove enough to save his skin.

Defender Simon Prestigiacomo, who withdrew on the eve of last week's grand final after succumbing to a groin complaint, will be hoping to push his way back into the side.

The 32-year-old joined his team-mates at training on Wednesday but faces an uphill battle to earn selection following the solid performance of Nathan Brown against Nick Riewoldt.

St Kilda are almost certain to be without ruckman Michael Gardiner (hamstring), paving the way for Ben McEvoy to earn a recall.

Collingwood will hold an open training session at Gosch's Paddock at 10.30am on Friday.

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