Carlos is currently on a season-long loan at Real Betis, and the Spaniard has revealed that he would like to stay at the La Liga club next season.
The 23-year-old told reporters: "I have no idea about the Everton thing. I did read the other day about interest from some other teams, but I do not know.
"Nobody has said anything to me. Now I am just focused on Betis and I would like to stay."
The former Spain Under-21 international began his career at Real Madrid.