Foord confident of Matildas response

Australia forward Caitlin Foord has no doubt the Matildas have the mental strength to bounce back from their loss to United States at the Women's World Cup.

Alen Stajcic's team suffered a 3-1 loss to USA in their opening game in Group D, leaving them bottom ahead of matches against Nigeria and Sweden.

But Foord, who played at left-back in the defeat, said the Matildas would have no problem responding against Nigeria on Saturday morning (AEST).

"I think mentally we'll be fine because there were a lot of positives to take out of that game," she said.

"I think we played some really good football so I think at the moment it's just physical – resting our bodies and getting them right for the next match."

Foord admitted to being surprised by Nigeria, who held Sweden to a 3-3 draw in their opening game, and is ready for a challenging encounter.

"They looked really good and looked strong," she said.

"It's going to be a tough game the next one. There are no really easy games at the World Cup. It's going to be tough."

The Matildas conceded twice in the final half-hour against USA, but Foord said fitness was no issue.

"I don't think too much fatigue, maybe a little bit," she said.

"But I think some lucky goals and I think we had a lot of chances up the other end and Hope [Solo] pulled off some really good saves so all credit to her for those."