Originally published at: Ange Postecoglou says Celtic are 'planning' to be ‘tested’ in the summer transfer window
Ange Postecoglou is well known now for his meticulous planning whenever it comes to a transfer window at Celtic. Never have we known the club to put so much preparation into incomings and outgoings prior to the Australian joining the club. And now, the Celtic manager has said that this summer will be the toughest…