CARLTON continues to play a waiting game with Chris Judd as the skipper battles the after effects of concussion.

On Wednesday, Judd was still feeling the effects of a heavy clash with Essendon’s Matthew Lloyd, and was restricted to stationary drills with the rehabilitation group on Friday.

The skipper’s session lasted just 20 minutes, but assistant coach Gavin Crosisca said Judd's performance on the track would count for little when the Blues made the final assessment on his fitness before Saturday's clash with the Tigers at the MCG.

"He's obviously a player you'd give right up to 10 minutes before the game to see if he was right, so we're fairly sure he'll be OK," Crosisca said, adding the decision was entirely Judd’s to make.

“If you’re talking about a first or second gamer with concussion and you’re trying to bring them in on the day of the game you wouldn’t be doing it. But Chris Judd is close to the best player I’ve ever seen play footy and he can take as long as he needs to take before he lets us know whether he’s going to be 110 per cent ready to go.

"I'm not a doctor so I'm not quite sure and we haven't really spoken about it this morning. But from what we've heard this week, he's going along well.

“He wasn’t overly flash Tuesday or Wednesday; we did a bit of indoor stuff and the lights got to him a little bit, but he should be okay.

“It’s just the general progression with your recovery from concussion. Some guys it can take two weeks and some guys it takes about a day.”

2007 best and fairest Andrew Carrazzo also suffered concussion in the battle against the Bombers, but trained with the main group, and is expected to take his place on Saturday.