Borussia Dortmund has told Chelsea transfer target Youssoufa Moukoko to sign a new contract by Sunday or leave the German club.

Moukoko’s contract at Borussia Dortmund expires in the summer and the 18 year old forward is attracting interest from Chelsea, Barcelona and Newcastle United.

Dortmund sporting director Sebastian Kehl told Germany’s Kicker magazine: “Youssoufa can accept this offer now and commit to Borussia Dortmund, or else there will be a parting of the ways.

“I would wish that he chooses us because he hasn’t yet completed his development and I see huge potential in him. But for us as a club there are limits.”