"It's wonderful that they have such confidence in me and see me as the successor of Petr Cech," Courtois told FM Brussel.
"Chelsea has a great sporting level and I can grow at ease for a few years until I reach the first team.
"This will not happen in a year or two, but three, four or five years. I might as well develop myself quietly.
"No matter what happens, I'll play again next season in the Genk jersey.
"Maybe I'll stay two years, it will depend on how I develop here. Then we'll see if I will be lent to an English team."