The 20-year-old attacking midfielder has recently emerged as one of Dutch football’s finest young talents after graduating from the Amsterdam side’s famous academy set-up.
Chelsea, Arsenal and Manchester United are already understood to be tracking Klaassen, and now it is believed that Spurs are also keen.
Ajax director of football Marc Overmars has already declared that the Eredivisie giants are desperate to keep their talented playmaker, but it is rumoured that a serious offer for his signature may be accepted at the end of the season.
Aston Villa are also interested in the £5m-rated passer, which could spark a bidding war in six months’ time.
Klaassen was voted the best player in the AEGON Future Cup in 2010, and has been long thought of as one of Ajax’s finest recent discoveries.
A skillful attacking midfielder, the Holland U-21 international has been compared to the likes of Wesley Sneijder and Rafael van der Vaart, who are also products of Ajax’s conveyor belt of talent.