Kristoffer Ajer with a £10m-plus offer. The Norwegian international centre-back has made clear his desire to leave Parkhead this summer as he enters the final year of his contract.
Boss Ange Postecoglou has not ruled out keeping the in-demand centre-back, although Celtic would then face the possibility of losing him for free next summer.
Norwich boss Daniel Farke has secured Billy Gilmour on-loan for his side's return to the Premier League and The Sunday Post (print edition) report he now wants to add Ajer to his ranks.
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