Australia boss Ange Postecoglou admitted tiredness caught up with his side as they lost 3-0 to Spain.
Spain manager Vicente del Bosque will make a decision on his future in the next week.
Spain secured their first win of the 2014 World Cup after easing to a comfortable 3-0 victory over Australia.
FFA chief executive admits Tim Cahill joining Sydney FC would be a huge coup for the A-League, amid reports of a move.
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