Geelong are sweating on the fitness of concussed skipper Joel Selwood ahead of Saturday’s tantalising clash against ladder leaders Greater Western Sydney.

Selwood was laid out unconscious, flat on his back on the Simonds Stadium turf in the first minute of Sunday’s thrilling win over Fremantle after a head clash with Hayden Ballantyne.

He was helped off the ground by two trainers before jogging to the Cats’ rooms for assessment where he was ruled out for the rest of the game.

“The short answer is yes, but which end of the spectrum from extreme doubt to just a little bit?” coach Chris Scott replied when asked if the skipper was in doubt for Saturday night’s clash at Spotless Stadium.

“I can’t give you an outlook on the positive or negative side but I will say we’re really confident that he’ll work through a really stringent process which will give us an outcome independent of the coaches, players and administration.

“He was up and about really quickly and he was talking to me about how the game was going on, which is a good sign.

“He certainly wasn’t in such a state where he couldn’t speak to his teammates and coaches coherently.”

The third-placed Cats have a six-day break before they meet the Giants, but Scott said the fact Selwood had barely been on the ground a minute could count in his favour.

Impressive defender Tom Stewart didn’t see any action in the second half and faces a period on the sidelines after copping a blow to the face.

“He has got a significant eye socket injury,” Scott reported, adding that he had been sent to hospital for scans and treatment.

“I’m not sure of the exact extent of the injury but the nature seems to be a facial fracture of some sort.”

Darcy Lang was knocked out of the game with an ankle injury in the third quarter, while Lachie Henderson (groin) and Jordan Cunico (ankle) were withdrawn from the team on Friday and match day respectively.