If history does indeed tend to repeat itself, then GWS don't need to worry too much about their AFL form slump.

Defender Jack Buckley is confident their run as premiership contenders is far from over despite a frustrating 16-point loss to Port Adelaide on home turf.

Lacking drive or a spark ahead of the ball, the seventh-placed Giants (7-5) were held to just one goal in the second half at Manuka Oval in Canberra.

It was their second defeat in five matches, having only just claimed back-to-back wins for the first time since round five.

Following a 4-1 start to the season, GWS's path to Saturday's semi-final rematch against the Brisbane Lions has been a roller-coaster ride.

Adam Kingsley's men suffered three straight defeats, then bounced back with a spirited win over Geelong in round nine, only to be thrashed by Fremantle.

They regrouped to beat Carlton, before escaping a shock loss to Richmond with a last-gasp effort ahead of last round's Power outage.

But Buckley won't sweat, saying it's a ride to finals his team has been on before.

"You'd probably find over the last two years, this time of the year, we've probably been in similar positions," Buckley said on Tuesday.

"You don't want to be in that position, but you can draw upon those experiences to keep the faith - that we have done in the past and turn it around.

"There's always frustration, but I don't think anyone's losing belief, which is the main thing."

Finding consistency on the field is the No.1 agenda item ahead of their trip to the Gabba.

It's a simple enough task, but Buckley admits the idea so far has been elusive.

"If I had the answer for that, I'd probably make a bit of money off it," Buckley said.

"Everyone's looking for it. It's easy to come up here and say we need to be consistent.

"Consistency probably just comes off the back of habits."

Reigning premiers Brisbane (9-3) sit second on the ladder and will be looking to bounce back after a five-point loss to Adelaide.

The Lions blew a 21-point lead, and their last five results include two wins, one draw and two losses.

Saturday's clash will also be the first time the two sides meet after last year's semi-final, where Brisbane turned around a 44-point deficit to win by five.

"You can't really rectify that this week in a home and away game," Buckley, insisting GWS aren't motivated by redemption or revenge, said.

"I don't think that'd be too big a theme in terms of getting one back on them.

"We've just got to do everything we can this week and the rest of season to get back in the same position we were in then last year."

Giants captain Toby Greene will need to prove his fitness after suffering a corked left hip/glute in the first quarter against Port.

He was substituted for Brent Daniels at halftime after copping a knee from Power defender Aliir Aliir.

"You're always backing him. He's one of the best I've ever seen at playing through injury," Buckley said.

"He's still a bit sore, but we'll see."