West Ham United co-owner David Sullivan has tipped new signing Diego Poyet for big things.

Poyet signed for West Ham on a free transfer from Charlton Athletic.

Sullivan told whufc.com: "Poyet could be a world-class player within 12 or 18 months. Whether he's ready now or needs six months, I don't know.

"People at Charlton tell me he's their best young player in the history of Charlton."

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