Viduka considered retiring from international competition after the 2006 World Cup, citing increasing family commitments as the primary reason. In September 2006, however, he confirmed that he would continue playing for Australia and intended to compete in the 2007 Asian Cup. In a friendly against Singapore, a week before the start of the Asian Cup, Viduka scored two headed goals in a 3–0 victory for Australia; former Leeds teammate Harry Kewell scored the third. It was the second time he scored two goals in an international match, having previously done so against the Solomon Islands in 2005.