Collingwood captain Scott Pendlebury is unsure whether he will recover in time from injury for Saturday's big AFL clash with Geelong.
The star midfielder returned to Melbourne wearing a moon boot after he suffered an ankle injury in Sunday's seven-point win over Brisbane.
The Magpies' improved form has turned their home clash against the Cats at the MCG this Sunday into a blockbuster.
"It's actually pulled up not too bad, so I will get a scan and see what's there," Pendlebury said.
"If it's only a bit of bruising or something like that then maybe, but if it's more, then obviously not.
"We'll just have to wait and see."
Pendlebury had to sit out most of the second half on Sunday after suffering the injury in the second term.
In other injury news from round seven, Adelaide coach Don Pyke is hopeful Wayne Milera won't become the Crows' latest hamstring victim.
But the emerging defender remains in doubt for next Saturday's Showdown against arch-rivals Port Adelaide.
Milera went off the ground in the second quarter of their 55-point victory over winless Carlton to have the back of his leg iced and did not re-emerge after halftime.
After Pyke on Wednesday expressed confidence that the club's wretched run of hamstring injuries is behind them, scans will reveal if Milera will join teammates Taylor Walker, Eddie Betts, Matt Crouch, Kyle Hartigan, Kyle Cheney, Sam Gibson and Lachlan Murphy as the Crows' eighth hamstring casualty, seven rounds into 2018.
"I don't know if it's quite (a hamstring)," Pyke said after Saturday's game.
"It's a bit early to say it's a hamstring at this point. It's in the back of the knee area, around the tendon.
"I haven't spoken to the doctors yet but clearly at halftime they got him out and felt it wasn't worth taking the risk at that point."
Walker is expected to return for the latest Showdown and Geelong star Gary Ablett is set to resume from his hamstring injury.
Other key injuries arising from round seven include West Coast's Luke Shuey (hamstring), Carlton's Levi Casboult (ribs), St Kilda's Paddy McCartin (neck) and Richmond's Dion Prestia (calf).
Tigers skipper Trent Cotchin was a late withdrawal with a knee problem following his side's round six win over the Magpies.