GWS defender Aidan Corr has been ruled out of the remainder of his side's clash against Collingwood after suffering a concussion in the opening seconds of the match.

Corr fell awkwardly after taken a mark from the first centre clearance, and was knocked out after falling over teammate Phil Davis and landing on his neck.

Corr was dazed and helped from the field by the club's trainers, before walking down the race unassisted.

Despite heading to the race on his own accord, Corr was ruled out of the rest of the match at quarter time with concussion, and the Giants are now down to three on the bench for the remainder of the game.