West Coast coach Adam Simpson has scoffed at talk they will treat the grand final as a free hit, declaring his charges are on a mission to bring home the silverware.

The Eagles will take on Hawthorn in the decider after beating North Melbourne by 25 points in Saturday night’s preliminary final at Domain Stadium.

Hawthorn are just one win away from securing a premiership hat-trick and they’ve been installed as early favourites.

But Simpson has bristled at suggestions his team have nothing to lose given no one rated them at the start of the season.

“No way. No such thing as a free hit for a grand final. Please,” Simpson said.

“We’re going to enjoy what we’ve done to this point but we’re on a mission.

“We want to win a premiership. We’ve now given ourselves an opportunity to do that.

“Hawthorn are experienced warriors. We’ve got to match that.

“I don’t think we’re going to fluke it. We’ll have to earn every kick and handball we can get next week.”

West Coast trailed North Melbourne 22-2 at quarter-time but they took control thereafter to secure the 10.20 (80) to 7.13 (55) win.

Simpson knows his charges can ill afford another wayward display in front of goal if they are to topple Hawthorn, who will be gunning for revenge after being embarrassed by West Coast a fortnight ago.

“We were second or third last year for accuracy, so it’s not like we can’t do it,” Simpson said.

“We should have kicked more goals against the Kangaroos.

“We couldn’t work on goalkicking anymore but there was a stage tonight where I thought it could have cost us the game.”

Simpson heaped praise on Josh Kennedy, whose two goals in the second quarter sparked West Coast to life.

But it was West Coast’s defence that had Simpson gushing most, with North Melbourne spearheads Drew Petrie, Jarrad Waite and Ben Brown kicking just one goal between them.

The Hawks enter the grand final in hot form after dismantling Adelaide and Fremantle.

Star Hawthorn forward Jack Gunston is a strong chance to return for the decider, while West Coast are set to go in unchanged after getting through the Roos game unscathed.

Eagles midfielder Chris Masten was subbed off against the Kangaroos in his first match back from a hamstring issue.

But Simpson said there was no problem with the 26-year-old, who tallied just 10 disposals.

“He’d only played one quarter in five weeks (before the preliminary final). It was a really tough decision whether we subbed him or not.”