AC Milan CEO Adriano Galliani has refused to rule out a return for Kaka.
The Brazilian playmaker left the San Siro for Real Madrid in 2009 in a deal worth around £55m.
However, the 30-year-old is expected to be heading for the exit door at the Santiago Bernabeu this summer after falling out of favour with coach Jose Mourinho.
When asked about Kaka, Galliani told reporters: "Certain love affairs never end. They go a long way away and then come back."
Madrid are understood to want around £8m for the Brazil international.
