sentences:  Australia then beat South Korea (2–1) in extra time to win in the final to win its first AFC Asian Cup.Two weeks after Australia qualified for the 2018 FIFA World Cup, on 22 November 2017, Postecoglou announced his resignation as Socceroos coach.On 19 December 2017 Yokohama F. Marinos announced they had appointed Postecoglou as head coach at the Succession of the 2017 Japanese Emperor's Cup.