Former West Ham defender Glen Johnson believes Chelsea may have to extend Mason Mount's stay at the club in order to sign Declan Rice.
The west London outfit have long been interested in their former academy product, who left to join the Hammers as a teenager. Rice has gone on to make more than 300 appearances for the club and is now captain following Mark Noble's retirement at the end of last season.
The England international's development in east London has seen him be linked with a move to not only Graham Potter's side but Manchester United as well, though a departure in January seems unlikely.
