Foord had a handful of chances to kill South Korea off on Sunday in a 3-3 draw in Sydney that sent Australia through to the knockout stages as runners-up in Group A.
The Matildas will head to Perth ahead of a quarter-final on Friday.
But things could have been so much easier for Australia, who would have stayed in Sydney up until the final and avoided travelling across the country, if they had put Korea to the sword.
Arsenal forward Foord has been one of the Matildas' most-dependable attacking threats over her international career but was left kicking herself after having an off night in front of goal.
"It's quite frustrating that we made it difficult for ourselves," Foord said.
"We had a lot of chances and we weren't clinical enough, myself included, we just need to tighten things up going into the next game.
"I think it was on ourselves, we gave away easy goals and we missed big chances and if I put that early chance away it's a different game.
"I still think we can take positives out of it in how we came back (from 1-0 and 3-2 down) and I think if we had another minute we would have come back.
"We haven't lost anything, we're just making things harder for ourselves but I think that's when we're at our best.
"We're used to these do or die games and we'll be ready for it."
Midfielder Katrina Gorry said her side had been handed a lesson in tournament football by the Koreans.
South Korea grabbed their opener through a counter attack where Australia were caught out at the back, before adding two goals in a dizzying four-minute spell after halftime.
"We obviously wanted more but at the end of the day we fought back and it's disappointing we didn't win the game," Gorry said.
"In tournament mode you have to learn your lessons early on and I think we learned one.
"We're Australia, we're always fighting aren't we? We go to Perth, we play China or North Korea, so it's going to be a tough game.
"But we like it when we have a tough game and we come out strong, our backs are against the wall but we are ready to go."
31°C