Reece Oxford was on the bench for West Ham United in their Capital One Cup defeat to Sheffield United.
Oxford was named as a substitute for their Capital One Cup tie against Sheffield United on Tuesday night.
The defender, 15, was fast-tracked to the Hammers' Under-18 side last season and has already made two appearances for the Under-21 team this year.
The Daily Mail says Oxford has been watched by scouts from several top clubs, including Arsenal and Chelsea.
But Manchester United are believed to be the club with the most active interest in the young star, with Louis van Gaal looking to bring in young talent to the club.
West Ham have fast-tracked Oxford to the first team in the hope that playing at a higher level will help keep him at the club.
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