AC Milan vice-president Adriano Galliani has praised Kaka for his performances since re-joining the club in the summer.
The Brazilian scored for Milan during their 3-1 win over Catania on Sunday, and Galliani admits that bringing him back to the San Siro has proved to be a success.
"Ricky is a phenomenon," Football Italia quotes him as saying.
"You know I cried in 2009 when I went to sell him to Real, then I thank the Lord that I had the idea on August 31 to go to Madrid, without any pre-arranged appointment, and from there it all happened and Kaka came back."
Milan visit Livorno in Serie A on Saturday.