West Ham United chief David Sullivan is frustrated over hostile raids on their academy.
The Mirror says the Hammers have offered exciting young defender Reece Oxford their biggest deal for any player under 20 in a bid to keep him.
Manchester United are circling for the 15-year-old centre-back, who has been likened to Rio Ferdinand.
Arsenal raided Upton Park recently to poach 16-year-old Ben Sheaf - regarded as one of the best young midfielders in the country.
Sullivan told the Mirror: "It almost makes you give up on having an academy if they can come in and nick your best 15-year-old. What's the point?"
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