With Levi Colwill and Tosin Adarabioyo sidelined by injuries, Chelsea have identified Rennes’ Jeremy Jacquet as their primary January target.
The 20-year-old center-back is valued at £44 million by the Ligue 1 side.
New Blues boss Liam Rosenior is desperate for defensive reinforcements to stabilise a backline that has struggled for consistency.
Reports suggest Chelsea may have to fend off interest from Bayern Munich to secure the Frenchman's signature.
