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Mooy delighted to reunite with 'intimidating' Postecoglou at Celtic  The Australia midfielder says he can't wait to get started with the Scottish champions.  Celtic’s new signing Aaron Mooy says he joined the club to win trophies and is happy to be back working with former Australia boss Ange Postecoglou again.  Mooy joined Celtic’s list of summer recruits when he signed a two-year deal earlier this week and is working with his new team-mates as they prepare to defend their domestic crown and compete in the Champions League.  The experienced midfielder said the opportunity to win things was a major factor in his decision to move to Glasgow when he had options after leaving Chinese side Shanghai Port.