Kaka's financial advisor claims Real Madrid are ready to make a record-breaking offer for the Milan schemer.
Milan are determined to fend off interest in the Brazil international, who has been a long-term target of Real president Ramon Calderon.
Reports have suggested that the Spanish champions are willing to bid a world record sum of €90million (£60.7million) in an attempt to persuade Milan to sell.
And Kaka's financial representative Diogo Kotscho has acknowledged it could give the player a tough decision to make.
"Real Madrid are certain that that sum can make Milan change their idea," Kotscho told Globoesport.com.
"I believe that this is an opportunity that Kaka must think very hard about."
Meanwhile, there is speculation that Milan are chasing Real forward Julio Baptista, who spent last season on loan at Arsenal.
Real sporting director Predrag Mijatovic and Milan vice-president Adriano Galliani met in Italy on Sunday, with Baptista rumoured to be a topic of discussion.
Though Barcelona striker Samuel Eto'o remains the Rossoneri's prime target, Baptista is being considered as an alternative.
Regarding the Brazilian's future with Real, coach Bernd Schuster told AS: "He will come to Germany and I will speak to him to see how everything is."
