The goalkeeper, currently on loan at Atletico Madrid, says that talks with Jose Mourinho are expected in the near future and that his career remains in the Portuguese's hands
The Belgium No.1 has been plying his trade at the Vicente Calderon for the past three seasons, earning rave reviews, but is now keen to discuss his future at his parent club ahead of next term.
Courtois's current deal runs out in 2016, with an extension mooted, and he insists that he does not expect to oust current Chelsea first-choice keeper Petr Cech but is not willing to spend his days as a substitute.
"My agent is currently talking with Chelsea," Courtois told Knack magazine. "I'll have a chat with Jose Mourinho. When we meet hasn't been decided yet. January is a busy month for me and also for Chelsea.
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"I can say what I think but, in the end, the boss makes the decision. It is a game of supply and demand. Clubs don't gain an advantage by making a decision against the will of a player.
"Clubs who are interested have to pay what Chelsea asks - if they want to sell me, of course."
Kevin De Bruyne is reportedly close to joining Wolfsburg on loan, with a view to a permanent move, after failing to break into Mourinho's first team and Courtois hopes that he and the rest of the Belgian contingent can all impress at Stamford Bridge in the future.
He continued: "Eden Hazard is the only of the four Belgians who've made it into the first team. Romelu Lukaku, Kevin De Bruyne ... I knew it wouldn't be easy when we signed, so we don't have to moan.
"Maybe we'll end up once all four in the team - who knows? And if not, we will find a solution for our careers."