Celtic fullback Josip Juranovic is emerging as a critical January target for Chelsea.
The club have learned that right-back Reece James is out until February at the earliest.
James suffered another injury in his comeback against Bournemouth this week.
Per The Express, the Blues will not rush James this time, as they want to ensure he suffers no recurring issues.
That means they will look to secure a backup and rotation option in that position.
Juranovic is seen as the ideal candidate, as he is available for little over £8 million.