Atletico Madrid hitman Antoine Griezmann is a top-priority signing for Chelsea manager Jose Mourinho this winter, but the Blues are at risk of losing youngster Charly Musonda to one of their Premier League rivals.
A report from Steve Stammers of the Mirror indicated Griezmann is Chelsea's "No. 1 target" ahead of the January transfer window, with the west London giants desperate to boost their attack.
Mourinho's need for January improvements was highlighted by Saturday's 1-0 home defeat to top-flight new boys Bournemouth, leaving Chelsea just three points off the Premier League relegation zone.