Manchester United and Arsenal have reportedly sent scouts to watch CSKA Sofia defender Valentin Antov ahead of next summer's transfer window.
The player has attracted the interest of a number of European clubs following a string of commanding performances at the back in Bulgaria.
Antov became CSKA's youngest ever debutant by making his first senior appearance for the club at the age of 14.
According to Frog News, the two clubs sent out scouts to watch the 19-year-old in action during a recent 0-0 draw with Ludogorets.
It is claimed that West Ham United are also interested in launching a bid for the central defender, who can also operate as a holding midfielder.