Kaka has said he will do whatever it takes to move back to AC Milan after declaring he is unhappy at Real Madrid.
The 30-year-old has endured a torrid time since moving to the Spanish capital for €68.5 million back in 2009, undergoing surgery on his knee and falling victim to countless injuries.
He has made just seven league appearances under Jose Mourinho this term and told Sky Italia he hopes Real and his former club Milan can agree to his return.
"It is not a good situation neither for me nor Real," said the Brazilian. "If they come to an agreement with Milan it is good for me and good for them.
"I'm ready to do everything to come back to Milan. I have had some beautiful moments in Milan, I have friends there."
He added on Twitter: "For me it is a delicate situation. If Madrid and Milan reach an agreement, I am willing to make a sacrifice to return."
However, speaking earlier on Wednesday, Milan's Adriano Galliani said that moves for both Kaka and David Beckham - also subject to rumours he could make his own reappearance with the San Siro club - are highly unlikely.
"Kaka is impossible, as his wages are the problem," said the vice-president. "David Beckham is a suggestion. However, I'd say it is 99.9% unlikely to happen."
Spanish newspaper Marca has suggested Kaka may instead secure a transfer to Fluminense, who apparently could match his reported €10 million salary.
Of the rumour, former Brazil international Ronaldo said: TV "Kaka to Fluminense - I am not saying that I think he will go or he will not. There is something, but they need to reach an agreement."