Robinho has expressed his desire to see Kaka rejoin him at AC Milan this summer.
Kaka left the San Siro in 2009 to sign for Real Madrid in a deal worth in the region of £50m.
However, the 30-year-old has struggled to establish himself at the Bernabeu, leading to speculation linking him with a return to Milan before the new season.
Robinho, who has also played for Madrid, has admitted that he would be delighted to see his fellow Brazilian back in a red and black shirt.
"I would be very happy if Kaka returned to Milan," Robinho told Marca.
"We are teammates with the national team and we could achieve a lot together, especially now that both of us want to get ready for the 2014 World Cup."
Robinho joined the Rossoneri in 2010.