Aurelio Vidmar's future as coach of Adelaide United is in doubt. Top level sources have told Vidmar could be leaving Adelaide in the coming weeks.

With the Reds' Champions League campaign now over, Adelaide are focusing on the new A-League season and face the prospect of kicking off with a new head coach.

Adelaide finished rock bottom last season, but Vidmar and the Reds regained respect through a successful Champions League campaign.

The former Standard Liege and Feyenoord striker has been mentioned as a potential appointment to the Australian national coaching team after the World Cup.