Toon scouts are tracking McCarthy, 23, who has played for England at Under-21s level.

Dutch stopper Krul, 25, has been linked with a move to ­Juventus to succeed Italy legend Gianluigi Buffon.

As a result, there were claims last week that Newcastle would demand £20million for the keeper if The Old Lady do make a bid.

Krul, who will have three years remaining on his contract at St James’ Park at the end of this season, has also been a target for Spurs.

And his display against Tottenham at White Hart Lane recently, when he kept a clean sheet in a 1-0 win, has only increased the London outfit’s interest.