Assistant coach Mark van Bommel has been doing his homework on Denmark and believes they could make for a greater challenge than the French.
"Denmark they used to play 4-4-2 and long ball but they changed the way they play because they have the style of players to play another system," van Bommel said.
"Some of them are playing for really good clubs. They have a really good team.
"Maybe a little bit like we try to do, they play as a team and they want to work as a team.
"It will be a more difficult game I think than against France. But we're going to prepare them really good in the next couple days and prepare them like we did against France.
"If we can achieve that level of play then we have a good chance."
The two countries have faced each other three times before with Denmark claiming two wins to Australia's one.
Their fourth meeting in Samara on June 21 will be a vital for the Socceroos with a loss all but ending their hopes of progressing to the round of 16.