Mijatovic was asked about Bale's situation after seeing him score in last night's victory at Real Sociedad.
"For some things or for others, Bale has not adapted, but today he has scored a goal," he told Cadena SER.
"If I would have sold Bale? I would have to know more, but talking to you now, I might."
Mijatovic added: "Of course I would like to return to Madrid, but with Florentino (Perez) I do not think I will return because I do not think he would want me there.