Liverpool and Everton have joined the list of clubs monitoring developments with Birmingham City midfield prospect George Hall.
The 18-year-old missed Friday night's 3-2 win over Reading with a calf strain but has been part of manager John Eustace's first team plans this season and has been tipped for a bright future.
Leeds United have long been following the England U19 international and made an attempt to sign him last summer only to be put off by Birmingham's valuation.
They are expected to renew their efforts to sign him next month but recognise competition is increasing.