SEVERAL stars,including Sydney Swan Adam Goodesand Geelong's Steve Johnson, couldmiss key matches this week due to injury or suspension. 

Goodes tweakedhis right knee and was later substituted out of the Swans' clash with PortAdelaide on Saturday. 

Despite hisrenowned recuperative powers, the dual Brownlow medallist remains in doubt forhis side's big clash with Carlton at the SCG on Friday night. 

Compounding theCats' shock loss to the Brisbane Lions on Sunday, Johnson is expected to comeunder scrutiny for a heavy bump that left Lions star Pearce Hanley dazed. 

Suspension wouldmean the brilliant Johnson would miss his club's crucial clash with Fremantle atSimonds Stadium on Saturday night. 

The Dockers willalso be sweating on the availability of midfielder Michael Barlow, who was sent to hospital for scans afterreceiving a knock to the face in a marking contest during the his side's winover North Melbourne on Sunday.

Barlow is one of three midfield guns that Freo willmonitor closely. 

David Mundy wasa late withdrawal with a calf problem but is expected to face the Cats, as is Stephen Hill (shoulder). 

Richmond'sdefensive organiser Troy Chaplin isin doubt for the clash with St Kilda on Sunday after damaging his troublesomeleft knee, the same one he had issues with at Port Adelaide. 

Fellow Tigersdefender David Astbury hurt his lefthamstring. 

The lefthamstring of North Melbourne goalsneak Lindsay Thomas is also a problem after the ColemanMedal contender was subbed out during North's loss to Freo. 

Numerous potentialinjury issues emerged during Hawthorn's win over West Coast on Friday night. 

The Eagles couldconfront Essendon at Patersons Stadium on Thursday night without severalimportant players including Shannon Hurn (right ankle), Luke Shuey (shoulder), ScottSelwood (hand) and Nic Naitanui (head knock). 

West Coast willrelease an injury update on Monday afternoon. 

Eagles veteran AndrewEmbley will also come under the microscope for misconduct after appearingto drop his knees on the chest of Hawthorn defender Ben Stratton. 

Meanwhile, theHawks, who face a rejuvenated Brisbane Lions at Aurora Stadium on Sunday, arein danger of losing gun trio GrantBirchall (knee), Josh Gibson (ankle)and Luke Breust (ankle), while Paul Puopolo was a late withdrawal onFriday night after experiencing tightness. 

The Match ReviewPanel will also assess two incidents from the second quarter ofthe St Kilda-Melbourne clash at the MCG on Saturday. 

Demons big man Jake Spencer appears to be in troubleafter making head-high frontal contact with Saints ruckmanBen McEvoy, who was concussed and subsequently substituted out of the game. 

About 10 minutes later, St Kilda defender Tom Simpkin dropped Melbourne forwardChris Dawes behind the play with a left fist to the jaw.