The Belgian has been strongly mooted as the first major target of incoming boss Antonio Conte as the Italian plots a major overhaul in West London.
A tenacious midfield presence, talks were understood to be underway between the Blues and those behind the scenes in the Italian capital.
However, he also suggests that should an offer arrive from Manchester United, who ironically have just been taken over by former Blues chief Jose Mourinho, he would be open to the prospect of moving to Old Trafford.
The Red Devils themselves have been linked with a move for Chelsea midfielder Nemanja Matic, though Nainggolan could prove to be a more dynamic option.
Would Nainggolan be the perfect signing for Chelsea?