The Eagles accounted for North Melbourne with a record-breaking 96-point win on Sunday afternoon - their biggest winning margin in a final.
They will now travel to Melbourne to take on a Collingwood outfit who suffered a 38-point defeat to Hawthorn on Friday night.
West Coast beat the Magpies by 49 points just a fortnight ago at Patersons Stadium, but Worsfold said his concern was not with the opposition.
"I've never ever felt any opposition are vulnerable," he said.
"For us our job is to go out and prepare with a mindset to play our absolute best footy.
"The opposition, we understand their job is to do the same. Bring their best footy to challenge us."
Potential All-Australian half-back flanker Beau Waters will likely miss the match after he suffered a foot injury in an innocuous incident during the second quarter.
Initial thoughts were that Waters had ruptured his Achilles but Worsfold later confirmed it was simply foot-related.
"He's been off already and had scans, but we obviously won't know the result of those scans until later tonight or tomorrow," he said.
"I'm not really sure what that means in terms of the scope of what type of injury it could be.
"He has a strong leadership role off the field as well and around the club.
"He does some outstanding work for us both on and off the field."
It will be a six-day turnaround for West Coast to face Collingwood, which would be followed by another six days if they were to get past the Pies.
"The nine days really helped freshen us up, so we've got a little bit in the tank from the last nine days," Worsfold said.
"We just prepare. We know what it takes to prepare to play on a Saturday night away from Perth."
Worsfold would not rule out a surprise return for Matt Rosa just three weeks after breaking his collarbone against the Magpies.
"He is absolutely every chance, he would say," Worsfold said of the Eagles wingman.
"I'll go on what he says. If he thinks he's ready to go, then I will heed a lot out of that, because I don't know how his arm feels."But he's been running no worries for a week or so, doing weights, full strength weights, so his arm's strong and feeling good."