Former Celtic star explains why Ange Postecoglou has succeeded

When Ange Postecoglou arrived at Celtic, the odds were pretty much stacked against him. The club had finished the previous season trophyless and 25 points behind the Rangers. The squad needed a major overhaul with key players like Scott Brown, Odsonne Edouard, Kristoffer Ajer, Ryan Christie and several loan stars leaving...