The 35-year-old was prolific for the London side in his eight-year stint, becoming a club legend with 157 goals in 341 games.
Drogba memorably scored the goal that forced the 2012 UEFA Champions League final against Bayern Munich into extra-time before Chelsea won on penalties in what was his final game for the club, and he is frequently linked with a return to England.
"Drogba is worshipped at this club and this is perfectly normal," he told Portuguese daily A Bola.
"I think one day he'll return to Chelsea.
"He is a very important player in Chelsea's history and will always be in the memory of the fans, the management, the owner and his team-mates.
"It is normal that he will have a future at Chelsea. As a coach? I do not know."
For now, though, the Ivory Coast international will continue to ply his trade at Turkish side Galatasaray, where he netted five goals in 13 Super Lig appearances last season.
