Celtic boss Neil Lennon insists defender Virgil van Dijk will only leave for big money this summer.
Manchester City and Manchester United are keen on the Dutchman.
"Virgil is our player and is on a three-year contract," said Lennon. "I get really frustrated with this scenario - we bring in a good player and then everyone is trying to sell him off after six months or a year because he's playing in Scotland or because England is just over the road.
"We're in no rush to sell and there is no need to sell. It's very premature."
