Chelsea are keeping tabs on Thorgan Hazard's situation at Borussia Monchengladbach.

The Belgian has been producing career best form this season and Gladbach accept they're on borrowed time keeping hold of the midfielder.

BILD says among a raft of interested clubs is Chelsea, which had Hazard on their books before selling him to Gladbach.

The Blues also boast a buy-back option in the deal and are actively discussing triggering it.

Indeed, it's suggested Thorgan could be re-signed by Chelsea to replace older brother Eden Hazard should he leave for Real Madrid.