Daniel Wells is "probably unlikely" to take his place in the team against Carlton, Brad Scott says.
"The quad is fine - the corky he recovered from pretty quickly. We probably thought that we'd get to a stage where if we had to unload him due to another injury or for whatever reason, that his achilles might get a little bit sore again," Scott said on Wednesday.
"His achilles is just not quite perfect, so I think you could all imagine how cautious we are going to be with that.
"It's possible he might play, but if he doesn't do enough on the track today, and he's got some tests to pass before we even risk him today ... so unless he's absolutely perfect it'll probably be the match committee's call to leave him out for another week, maybe two.
"I've been caught up giving predictions like this in the past, but what I can say is that we're really optimistic, and we are being potentially overly cautious.
"It's probably frustrating Wellsy a little bit, because he's missed so much footy, but we're determined not to turn this in to something that could be more serious.
"Until he's absolutely perfect we won't roll him out, so that probably rules him out for this week."
Meanwhile, Mason Wood (concussion) and Sam Wright (ankle) will have to pass fitness tests before being considered for selection.
Scott said Wood had "recovered incredibly" from his heavy landing after taking a strong pack mark against Essendon.
"He went to the VFL the next day, did his running on Monday, has consulted all the experts, and the experts have suggested to us that even though the incident can look pretty severe, sometimes you can recover really quickly," Scott said.
"So we'll still be very cautious with him, but the signs so far are really good."
However, the news was not so good for key defender Lachie Hansen in his recovery from a concussion suffered in the VFL two rounds ago.
Scott said Hansen still had lingering concussion systems and would not resume full training until he had fully recovered.
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