Lopes says a return to Sao Paulo for their former star is "unrealistic".
"Same thing regarding Jonas, we were interested in the past, but there is nothing going on at the moment."
Asked further about the chances of landing Kaka, he added: "Kaka has expectations at Real Madrid, and other clubs in Europe.
"If he doesn't stay there, there is interest in the United States too. All these offers can be more tempting than any a Brazilian club could do.
"The idea that Kaka could come to Sao Paulo is unrealistic."