The Champions League cloud that casts a long, dark shadow

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More than a year on from one of their most embarrassing European exits, Celtic are struggling to escape from a groundhog day entirely of their own making. Amid buzz phrases like "learning lessons" and "wake-up calls" following last weekend's derby drubbing at Ibrox, an interesting yet awkward question emerges: have Celtic learned anything at all from last year's costly mistakes? Going out of the Champions League to…

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