![Celtic boss Ange Postecoglou loses first Old Firm after Filip Helander's second-half goal](https://cdn.newsserve.net/ONPglobe256.png)
Celtic boss Ange Postecoglou loses first Old Firm after Filip Helander's second-half goal
Boss Ange Postecoglou's first Old Firm fixture ended in defeat after Filip Helander's second-half goal gave Rangers a 1-0 win over Celtic at Ibrox.
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