GREATER Western Sydney's shock loss to Collingwood last week cost them a top-four spot, but the Giants believe it could benefit their push towards their first finals berth.

GWS could have jumped to second on the ladder if they had beaten the Magpies by a sizeable margin at Spotless Stadium, but instead dropped to seventh after being humbled in a terrible performance after quarter-time.

After the match, coach Leon Cameron labelled the effort as his team's "worst 60 minutes of the year" and those who witnessed the 56-point turnaround would find it hard to argue.

Star forward Jeremy Cameron said Monday's review highlighted plenty of areas that need to be addressed ahead of Sunday's clash with the Brisbane Lions, but it was a good chance for the players to refocus. 

"I don't really look at the ladder and as a team we don't really focus on the ladder week to week," he said.

"We more just focus on the game coming up, and I think it's losses like that, that really help you in the long run. 

"We did a lot of things (last week) that really wasn't us and that we need to improve on.

"We could feel out things weren't going our way and that’s when we need to knuckle down and assert ourselves on the game.

"You're never going to have things on your terms for a whole game, but it's just getting the simple things right and getting back into the game that way, and the best teams do that all the time."