New Australia coach Ange Postecoglou wants Socceroos fans to become excited again.

Postecoglou aims to lift a fog of despair when he starts his five-year tenure in a friendly against Costa Rica on November 19 in Sydney.

"The team struggled and maybe morale is down as well," Postecoglou said of recent 6-0 away losses to Brazil and France.

"But if our players respond in the right way, they will get a lot of love from the crowd here (in Sydney).

"And hopefully we can restore some of that morale and confidence and then build it stage by stage."

Postecoglou, whose appointment on a five-year contract was confirmed by Football Federation Australia on Wednesday, refused to concede next year's World Cup in Brazil was a lost cause.

"The World Cup is an exciting time and when it comes around, I want people to be excited about watching their national team play," he said.

"Our goal between now and then is to restore some hope in that.

"I'm not discounting anything we do from now on."

Postecoglou will finish his stint as Melbourne Victory coach on Friday night, against his former A-League club Brisbane Roar.

On Monday, he will start selecting a Socceroos squad for the Costa Rica friendly.