Do Celtic have 'big issues', or will next four days hush concerns?

Football in Glasgow's goldfish bowl has a habit of being unnecessarily dramatised, yet there is a case for saying a week in mid-September could have a defining impact on Celtic's season.After spectacularly failing the first of three tests during this mini crucial spell, alarm bells are ringing among sections of an unconvinced support.Martin O'Neill's side have the chance to right the wrongs of their sobering 3-0 Premier Sports Cup quarter-final defeat by Rangers at Ibrox when they host their cit