Gattuso believes Kaka could be Milan's 'Mr X' as the days count down to the transfer deadline.
The veteran midfielder said: "Mr. X? I have always said the name of Kaka. To see him play so little at Real and to remember what he did here with this shirt and I believe for this city ...
"If he could train hard in the first 2-3 months he will revert to the past. Of course it remains a task that presents problems. Ricky is a good boy and even if we do not hear from him often, the fact he would wear this shirt again only for pride shows that he is not finished.
"There's this common belief that reheated soups never go well. There is talk of Gullit or Sheva for example, their returns were not positive like the first time around, but Kaka is still young and could do well."