Declan Rice will command a fee which will not just smash the British record but "blow it out of the water" if he leaves West Ham, says boss David Moyes.
England midfielder Rice, 24, has played 224 times for the Hammers since his 2017 debut and now captains the club.
"Undoubtedly Declan is going to be a top player," said Moyes.
"He'll be a British transfer record if he ever leaves West Ham."
Rice, who joined the Hammers youth set-up in 2014, only has 18 months left on his contract and has reportedly turned down new deals.