Andrew Welsh (Essendon) concussionCame off after heavy knock. Will be assessed during week but likely to play

Angus Monfries (Essendon)Both sustained sprained ankles and were unable to return. Will have scans today but both likely to miss at least one week.

Jay Neagle ankles

Brad Johnson (Western Bulldogs) ankleAlso sprained ankle but was able to return. Will be sore today but likely to be available this weekend.

Tom Hawkins (Geelong) footSoreness in the navicular bone stopped the young Cat from playing in the VFL on the weekend. This is probably the early stages of a stress fracture. He is likely to miss a few weeks.

Leo Barry (Sydney) hamstringCame off in the third quarter with hamstring soreness. If a strain is confirmed he will miss 2-3 weeks.

Ryan O'Keefe (Sydney) ankleInjured ankle in third quarter and required treatment before returning to be one of Sydney's best. May struggle to come up this week.

Michael O'Loughlin (Sydney) ankleAlso came off in third quarter with ankle injury but despite intensive treatment was unable to return. Probably has underlying instability and unlikely to play this week.

Andrew Walker (Carlton) shoulderInjured his "good" shoulder late in Sydney game. Will have scans today.

Brendan Fevola (Carlton) thighCopped a cork to the outer side of the thigh and struggled for a while yesterday. Should recover by next weekend.

Brock O'Brien (Fremantle) hamstringHamstring strain to the young Docker will keep him out for at least 2 weeks.

POSSIBLE RETURNS THIS WEEKJed Adcock (Bris Lions) quad

Joel Macdonald (Bris Lions) ankle

Dustin Fletcher (Essendon) ankle

Riley Dunn (Fremantle) hamstring

Roger Hayden (Fremantle) hamstring

David Wojcinski (Geelong) Achilles

Gary Ablett (Geelong) ankle

Cameron Ling (Geelong) cheek

Shane Crawford (Hawthorn) knee

James McDonald (Melbourne) groin

Peter Burgoyne (Port Adelaide) hamstring

Matthew Richardson (Richmond) hamstring

Nick Malceski (Sydney) calf

Peter Brukner is associate professor in sports medicine at University of Melbourne