Chelsea are keeping tabs on Willem II striker Alexander Isak.

The Mirror says Chelsea are tracking Borussia Dortmund's Isak, the teenage Swedish striker being hailed as the new Zlatan Ibrahimovic.

Isak, 19, is currently on-loan at Dutch club Willem II – and the Blues had him watched in last night's clash with Ajax in Tilburg.

He has scored 11 goals in 11 games since moving to Holland.

And his brilliant first touch and nimble footwork has seen the 6ft 3ins forward compared to Swedish legend Ibra.

Chelsea are in the market for a young striker after bringing in 31-year-old Gonzalo Higuain on loan from Juventus in January in a deal which includes an option to make the move permanent.

Madrid have continued to watch Isak's development and are likely to rival the Stamford Bridge club if Dortmund show a willingness to sell.