Soresen made 101 appearances for the Danish national team and over 400 Premier League appearances for Stoke City, Sunderland and Aston Villa, before finishing his career in Melbourne. 

The Dane was impressed with the A-League during his spell and believes the Socceroos' World Cup opponents will underestimate Australia at their own peril. 

"I think the Socceroos are just trying to find their feet under a new manager ... you can't put too much into results right now," Sorensen as part of a visit in Canberra on Wednesday.

"This is the last chance to try things. I'm sure Australia will be ready for the World Cup when it comes around," Sorensen told The Canberra Times.

"If you don't show Australia respect ... they've caused a lot of teams problems. If you don't take that seriously and you overlook them, you're stupid.

"The expectation in Denmark is the game against Australia is the one Denmark has to win. But Australia will be saying the same. I don't think anyone is looking down on Australia."

Sorensen also claimed that the World Cup will be the perfect opportunity for Rogic to showcase himself at the highest level.

"The World Cup is the best window to showcase yourself, all of the Australian players will be looking to that," he said.

"Everyone already has a sense of who [Rogic] is, a good World Cup can only help."