Borussia Dortmund have ruled out selling Erling Braut Haaland this summer amid interest from Chelsea.
BBC Sport understands the Blues have not lodged an official bid for the striker, who is 21 on 21 July.
Chelsea boss Thomas Tuchel is keen on Haaland, whose 20 goals in 16 Champions League games for RB Leipzig and Borussia Dortmund has made him one of Europe's most sought-after players.
Manchester City manager Pep Guardiola has also been monitoring the situation.
He is looking to sign a striker this summer following the exit of the club's record scorer Sergio Aguero, who joined Barcelona on a free transfer.