Brendan Rodgers has warned Manchester City that they will have to dig deep if they want to prise Daniel Agger away from Liverpool.
The Premier League champions have been heavily linked with the Denmark defender but the Liverpool manager says the club will only sell to a large offer.
"Agger is one of the leading players in European football, so it is going to be a big valuation," said Rodgers. "Is he a player I want to lose? No. He understands how I want to work and can play a real pivotal part in how I want to play.
"But I am a realist. If someone comes in with a massive bid and it is in the best interests of the club, you have to look at it."
Rodgers added: "Every player has a price and top centre-halves are at a premium – Thiago Silva has left AC Milan for PSG for £40m."