Young Crows defender Matthew Jaensch has been ruled out of Friday night's clash with St Kilda at Etihad Stadium.

Jaensch, who landed heavily on his right shoulder in the second term of last Friday night's game against Essendon, will be reassessed next week.

But Graham Johncock will be fit to play his 200th AFL game Friday night after passing a fitness test Wednesday morning.

Johncock has overcome his brusied hip injury and will train with the team Thursday.

Ian Callinan, returning from a hamstring strain, trained with the main group at a closed session Tuesday night but felt tightness early in the session and stopped training.

Callinan will be unavailable for Friday night's clash with St Kilda but is hopeful of returning next week.