Thorgan, the younger brother of Chelsea star Eden Hazard, has enjoyed regular first-team football out on loan rather than developing in the Chelsea youth set-up after arriving at Stamford Bridge from Lens last summer.
And his form has attracted interest from a host of Belgian clubs including champions Anderlecht, Club Brugge and Racing Genk.
Anderlecht chairman Roger Vanden Stock confirmed they enjoy a good relationship with the Premier League side, fuelling speculation a move for the 20-year-old winger is imminent.
"Thorgan Hazard? We have very good contacts with Chelsea," he told Belgian newspaper Het Nieuwsblad.