West Bromwich Albion have secured a major boost for the future by persuading England under-17 international Jonathan Leko to sign a new contract, in a blow to Chelsea and Manchester City.

Leko will officially sign his first professional deal in July, after turning 17 on Sunday, with West Brom determined to prevent another talented teenager from leaving the Hawthorns.

Albion have suffered huge frustration with Premier League clubs poaching their young talents in recent years, after the departure of Isaiah Brown to Chelsea and Jerome Sinclair to Liverpool.