Tottenham and Leeds United are the latest Premier League sides to run the rule over Aberdeen full-back Calvin Ramsay.
They joined Manchester United, Leicester and Southampton in sending scouts to check out the talented teenage defender against Rangers on Tuesday night.
Leicester and United are long-term admirers but there is also strong interest from Europe, including Bologna, Hoffenheim and Eintracht Frankfurt.
The 18-year-old has been a stand-out for the Dons this season and losing him would deal a major blow to Stephen Glass ' hopes of climbing the Premiership table.
Southampton have also been tracking the 18-year-old but are unlikely to move in this window.
Jack Gurr has terminated his contract with Aberdeen.
The 26-year-old full-back has decided to rip up the last five months of his contract and is now set to sign for American side Sacramento Republic later this month.