Chelsea, Sunderland and Manchester City are keen on Diego Poyet who has left Charlton after turning down their contract offer. The 19-year-old midfielder is the son of Sunderland boss Gus. The youngster came through Charlton's academy and managed to make 23 appearances for the Addicks last season. VIDEO Scroll down to watch Diego Poyet come face-to-face with Optimus Prime . Property: Poyet is expected to be unveiled by West Ham despite interest elsewhere .
Diego Poyet is the son of Sunderland manager Gus . The 19-year-old midfielder has left Charlton after turning down their contract offer . Manchester City, Chelsea and Sunderland are keeping tabs on the youngster .