Carlton ruck-forward Shaun Hampson is facing up to eight weeks on the AFL sidelines with a knee injury.

Scans on Monday confirmed Hampson strained his posterior cruciate ligament in Sunday's win over Sydney at Etihad Stadium.

Hampson will wear a knee brace for two weeks and will miss six to eight weeks of football, the Blues said.

But the timing of the injury makes Hampson's absence much less of a blow for Carlton, given the return to fitness of two other ruckmen.

Matthew Kreuzer starred in the win over the Swans in his second AFL game this season, after returning from a serious knee injury.

And Robert Warnock played in the VFL on the weekend.

Warnock started the season in strong form, but has been out of Carlton's side since being concussed against Geelong in round nine.

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