Ceballos says Ancelotti asked to be forgiven for not playing him as much as expected.
He told AS: “He is a coach who told me to forgive him, because I had not played the minutes I should have played and that honours him.
“The player always wants more and that is what I am looking for."
Asked about a return to Real Betis, the midfielder added: “When we start (preseason) we will see. We'll talk to the coach to see what he wants and from there we'll decide the future."
Ceballos has a deal with Real Madrid to 2023.