Geelong will be without star half-forward Paul Chapman because of a hamstring injury in Friday night's AFL grand final re-match against St Kilda at the MCG.

The Cats at least regained key forward Cameron Mooney and fullback Matthew Scarlett, who have both overcome injury.

Midfielder Simon Hogan was dropped.

Geelong will enter the second weekend of the split round 13 in top spot while St Kilda are second.

The Saints were also hit by injury, as half-back Raph Clarke will miss the game through a hamstring injury.

Clarke was replaced by youngster Jack Steven.

Collingwood made five changes for Saturday night's game against Sydney at ANZ Stadium.

Ruckman Josh Fraser and forward Paul Medhurst were dropped following the draw against Melbourne on the Queen's Birthday holiday, along with Brent Macaffer and Jaxson Barham.

Skipper Nick Maxwell could not be considered because of a calf injury.

The Magpies regained key players in midfielder Luke Ball, small forward Alan Didak and half-back Ben Johnson, who have all overcome injury.

Tall forward Chris Dawes was granted another chance, along with running defender Tyson Goldsack.

Sydney recalled key forward Daniel Bradshaw and defender Rhyce Shaw, a former Magpie, from injury and dropped youngsters Patrick Veszpremi and Gary Rohan.

Adelaide and Melbourne named expanded squads for Sunday's game at AAMI Stadium in the last game of the round.

But the Crows will be without defender Nathan Bock (groin), and Melbourne could not consider skipper James McDonald or utility Colin Sylvia, who remain sidelined through injury.

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