The Matildas have won a knockout stage match in a World Cup for the first time, thanks to a stunning 1-0 win over Brazil.

Kyah Simon was the star for Australia, scoring an 80th minute winner to sink one of the pre-tournament favourites.

The 23-year-old missed last year's Asian Cup thanks to a knee injury, but fought her way back into the team to cement her place in Australian football folk law.

“When you watch the girls on TV at the Asian Cup and you know you should be there, it was pretty tough," Simon told Sky Sports after the match.

“It was a tough road and I think I definitely came out of the other side mentally tougher," Simon said.

“I kind of knew, wet conditions, it's a nightmare for `keepers and they really on any day can fumble anything,” Simon told Fox Sports.

“All I had in the back of my mind was to follow up given there was a fumble by the `keeper.

“I was so lucky to be in the right place at the right time and pick up the `keeper's scraps.”

The goal came via an important steal in midfield, after Brazil missed several golden opportunities of their own.

Katrina Gorry won the ball in midfield, before setting up Lisa de Vanna, whose shot was parried by Brazilian keeper Luciana. Substitute Simon then pounced on the loose ball and buried it into the back of the net. The goal was the first Brazil had conceded all tournament.

Australia will face either reigning champions Japan or the Netherlands for a place in the semi-final.