Chelsea have rejected an approach from Barcelona for centre back Andreas Christensen, who has struggled for regular game time this season after a breakout campaign last term.
Barca are believed to be interested in signing a new defender, with Samuel Umtiti struggling with injury and Gerard Pique on the decline, but the Blues have no interest in letting their talented youngster leave just yet.
There are reportedly concerns regarding Christensen's ability to play in a back four, the system he largely played in during Antonio Conte's time at Stamford Bridge.
With a deal for Christensen now seemingly out of the picture, Barca may look for a short term fix in January before making a move for highly sought after Ajax defender Matthijs de Ligt.
The Netherlands international is one of the most talented young players in Europe but Ajax have played hardball over his future so far, with offers around £65m still not enough to prise their biggest talent away from the Eredivisie.
Christensen has struggled for game time so far this season and has not featured in the Premier League so far, his only appearances coming in the Europa League and Carabao Cup.