Norwich City reportedly believe they can land Celtic defender 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.
Celtic have already rebuffed the advances of Newcastle United and Bayer Leverkusen, indicating they are prepared to play hardball over the 23-year-old despite his contract situation.
But with Ajer keen to move on, Norwich's interest could give Postecoglou a big decision to make, not least since Leicester City have cooled their interest in Odsonne Edouard, Celtic's other potential big sale of the summer.
Meanwhile, Crystal Palace are poised to move for Ryan Christie if and when Patrick Vieira is appointed their new manager.
The Arsenal legend is on the verge of succeeding Roy Hodgson at Selhurst Park and our sister title The Sunday Mail exclusively revealed on Saturday night he has made the Scotland star a top target.
Former Nice manager Vieira was impressed by Christie during Celtic 's Europa League clashes with Ligue 1 side Rennes in 2019.
