Fremantle skipper Nat Fyfe has been ruled out of this Saturday night's Derby clash against West Coast.
Dockers general manager of football Peter Bell revealed that scans on Monday confirmed a strain in the star midfielder's right hamstring.
“Nat got through the game against St Kilda on Saturday,” Bell told the club website.
“On Monday, we had him do some tests on his right hamstring and he reported 100 per cent strength.
“On Tuesday after a training run he pulled up with a little bit of soreness so we sent him off for a scan.
“The scan indicated that he has a small strain to his right hamstring in a different area to the previous one, so unfortunately he will miss this week and potentially a few more games after that.
“Nat will get stuck into his rehabilitation and, hopefully, we’ll see him in a few weeks."
In other injury news, two young defenders - Hayden Young (ankle) and Griffin Logue (toe) - are set for an extended stint on the sidelines.
“Hayden had a right ankle injury and that’s been diagnosed as a syndesmosis injury,” Bell said.
“Hayden’s had surgery on that and is at home recuperating at the moment, then he’ll go into a longer term rehabilitation.
“I’m not sure exactly how long that will be, we are hopeful he will be back to play some football at the tail end of this season.”
Logue has been diagnoses with toe turf.
“Unfortunately Griffin has turf toe, which is a reasonably serious injury around that right big toe,” Bell said.
“The rehab plan for him is to have about five weeks of partial weight bearing to protect that toe and let it recover and then build from there.
“It’s another longer term injury and we’re hopeful he’ll be back later in the year.”
Fremantle and West Coast will face off at Optus Stadium on Saturday night at 6.35pm (AEST).