Matildas still on a high - Kellond-Knight

Australia midfielder Elise Kellond-Knight and the Matildas are still "living on a little bit of a high" after their win over Brazil.

An 80th-minute goal from Kyah Simon saw the Matildas upset Brazil 1-0 in the last 16 at the Women's World Cup on Monday morning (AEST).

With their quarter-final against Japan or Netherlands not until Sunday, the Matildas are still buzzing from their win.

"Still living on a little bit of a high. The comedown hasn't come yet," Kellond-Knight said after the Matildas landed back in Edmonton.

"Just trying to freshen up really, we've had a long day of travel, three-hour time difference so there's a lot to get over and recover with the next 48 hours."

The win over Brazil marked a first ever victory in the knockout stages of a World Cup by an Australian team.

But Kellond-Knight wants more from the Matildas.

"It's tough. You don't want to celebrate too much even though we have achieved something that is fantastic and the country is really proud of us," she said.

"At the same time, we have to keep our heads screwed on, we've only done part of the job and we've got a long way to go really to achieve our major goal and that's to win a medal at this tournament."

Meanwhile, Matildas attacker Sam Kerr insists she is feeling fine despite playing every minute of every game so far.

"The body's feeling all right. It's holding up," the 21-year-old said.

"I feel like I'm getting old but it's feeling good considering. Our medical staff is great and keeps us on the park so very thankful for them."