Courtois played for three seasons at Atletico on-loan from Chelsea.
Simeone, however, says: "I would not play him as a starter because (Jan) Oblak is better, it's normal if Courtois had said I was a bad person."
On Oblak's contract situation, Simeone was optimistic.
"I hope he renews, the club works with him, when everything is signed it will be good for the club and the team."
On Oblak being overlooked for the Goalkeeper of the Year awards, Simeone added: "It is clear that if he is not in that group, without any doubt, it gives little credibility to the prize, the world talks about Oblak as the best goalkeeper, surprising (his omission), no doubt surprising, but he has to follow the same line."