Aston Villa and Newcastle United both have a strong interest in signing Werder Bremen's 18-year-old defender, Karim Coulibaly. The clubs face competition from Chelsea, who have reportedly held significant talks, while Napoli, Marseille and PSG are also monitoring the Germany U21 international. Werder Bremen are asking for a fee between £30 million and £50 million, an amount that would represent a club-record sale. Although no formal bids have been submitted, initial discussions with the player's representatives have taken place. The German club is in a strong negotiating position because Coulibaly is contracted until 2029 and has no release clause.