These two sides have a long history of meeting on a big stage, but on both occasions in 2013 it has been the Swans who have triumphed, this time by 49 points.

Yet despite Bell Park's 0-2 record against the Swans this season, Armstrong is confident a mental factor is not to blame.

"It was probably a bit of both today, we didn't play well, but they played really well," he said.

"Last time we played them, I said we failed the test and that's twice now.

"They've got our measure at the minute, well and truly.