Former West Ham boss Sam Allardyce believes Declan Rice will leave in a swap deal.
The midfielder is the subject of a bid from Arsenal, with Manchester City and Manchester United also keen.
Allardyce said on the No Tippy-Tappy podcast, If I know Moysey [West Ham boss David Moyes], there would have to be a player in the deal for him and that would mean it would be easier for the club who is buying him because they wouldn't have to pay David Sullivan's asking price.
It would be over 100million in total but it would be so much under that if they include a player that would take the deal over 100m.
"And then David gets a new player he needs."