"He'll make the difference for us," said Mourinho of the player who is recovering from knee surgery.
"Kaka will be our free signing in January. His return will be fundamental for us."
Milan Vice-President Adriano Galliani was also mentioned by the tactician during the pre-match media conference.
"I want to thank Adriano Galliani for his kind words about me to Real President Florentino Perez last summer," Mou noted. "What did he say? Thanks for taking him to Madrid..."