Aloisi had appeared to be the Harbour City's prime target as their marquee player for the coming season.

But talks broke down with the club when the two sides couldn't agree on salary details and contract length.

Now a source close to Aloisi has lashed out at the way negotiations were handled.

"John would be doing the league a favour by coming back," said the insider who asked not to be named.

"The way they treated the negotiations with him was pretty disappointing."

The Socceroo hero - whose spotkick against Uruguay took Australia to the World Cup - now faces an uncertain future.

Aloisi and his family fly out of Adelaide today, bound for Spain where he set up home while playing for Alaves until his contract expired earlier this year.

Time is now running out for him to find a new club before the new season starts in leagues around the world.

Aloisi had hoped to be able to announce a move to a Scandinavian club today, but the deal fell through at the last moment.

"This club in Scandinavia... things have changed over the last day," said the insider. "Let's say, it's far from a done deal.

"Look, there are other clubs in Europe. With John, it's not all about money. It's about playing in a good league too, so there are options but time is fast running out."