Celtic boss Ronny Deila is delighted with their swoop for Manchester City defender Jason Denayer.
The young Belgian has joined the Hoops on-loan.
"I think we could get an option to buy Jason," said Deila, "but I don't think we have enough money.
"Jason is going to be worth a *lot* of money. He is already worth a lot of money.
"Is he a player worth £6m or £7m right now? I'd say he's worth more, maybe £10m."
Asked if Denayer could become worth £15m-£20m, Deila added: "Yes, he could. He's a very good player and he will have a great future - people will see it when he plays."
