West Coast coach John Worsfold has remained non-committal on the chances of star duo Dean Cox and Daniel Kerr playing in the Western Derby on Saturday.
Kerr injured his left hamstring in the Eagles' win over Brisbane on Sunday and was subbed out of the game in the third quarter.
Cox appeared to injure his knee in a ruck contest just before half-time and hobbled from the ground but returned to complete the match.
The pair will be tested at training on Wednesday with a clearer picture on their availability to come after the session.
Kerr had scans Tuesday on his hamstring, which revealed a similar injury Jack Darling overcame a fortnight ago to line up against Adelaide.
"There's a fair bit of work to do today whether he's going to play or not," Worsfold said.
"He's certainly not ruled out and we'll see how he feels when he runs around today.
"He was a bit concerned. He's got a history of how his hamstrings feel prior to doing his really bad injury a few years ago.
"His first test will be what he does today."
The Eagles will be without captain Darren Glass, who was suspended for one week following a hit on Jonathan Brown.
His suspension poses a selection dilemma for West Coast with Fremantle's wide range of tall forwards, including Matthew Pavlich, Kepler Bradley, Chris Mayne and ruckman Jonathon Griffin all potential opponents if he goes forward.
Worsfold said there was no shortage of options to replace Glass.
"(Jacob) Brennan went out of the side last week but has been going pretty well for us," he said.
"Ash Smith, Mitch Brown, Lewis Stevenson is in really red-hot form in the WAFL. We've been really pleased with how he's going."
Zac Clarke is expected to come under consideration for selection to stretch the Eagles' undersized defense.
While Worsfold is sweating over the availability of several big names, Fremantle coach Ross Lyon said his team was in perfect shape to face the Eagles.
"We're in pretty good nick," he said.
"No feathered hamstrings, it's pretty healthy really.
"A few bumps and bruises and I think everyone's cycling through a bit of illness, so keep your fingers crossed on that.
"But we're pretty healthy and some good performances in the WAFL to consider across the board."
Lyon also said Aaron Sandilands' recovery was progressing well from his toe injury, while Greg Broughton will have surgery on his injured finger and not return this year.