Ange Postecoglou wary of a Scottish Cup upset against Alloa Athletic

‘The magic of the cup’. While it may not be in any dictionary, it’s a phrase passed through football folklore to define the special moments that domestic competitions can throw up. It’s usually muttered when a shock takes place, one of the big teams losing out to a side in a lower division. When Celtic travel to face Alloa this evening in the fourth round of the Scottish Cup, it’s exactly the sort of occasion that the phrase is used for...