For the second time this AFL season, West Coast are anxiously awaiting match review officer Michael Christian's interpretation of a sling tackle resulting in concussion.
Sydney defender Colin O'Riordan was left dazed after his head hit the SCG turf during the second quarter, having been tackled to the ground by Eagles forward Willie Rioli.
West Coast ruckman Nathan Vardy also faces a nervous wait, having made contact with Jackson Thurlow's head after opting to bump in the second term.
Thurlow, like O'Riordan, played no part in the second half of Sunday's contest.
Rioli's teammate Lewis Jetta copped a one-game suspension after round nine, having slung Melbourne's Tim Smith to the ground in similar fashion.
"We lost a player this year through a similar incident, so we just have to work our way through that," Eagles coach Adam Simpson said after Sunday's 45-point loss.
"Has he been reported? Let's wait until that happens, if that happens.
"It's a difficult one to interpret. Difficult one to execute sometimes, when you've got players around the waist or their arms are free, and you know they're going to handball.
"A bit of that is method. A bit of it is just the situation you're in and you have to think your way through it."
In more positive news for the reigning premiers, ahead of a bye, Simpson suggested club champion Elliot Yeo, captain Shannon Hurn, defender Tom Barrass and ruckman Nic Naitanui should return soon from injury.
"They'll find themselves back in the side pretty quick," Simpson said, still seething after his side's lopsided defeat.
"We're 8-4, in the top four going into our week off. That's great - we'll take that.
"But it's hard to get past tonight. We need to look at what we did, how we went about it and reflect.
"We'll spend the week off looking at where we're at as a club and a team - what we need to get better at, because we need to get better."