Links pairing the former Manchester City man with a return to Brazil have intensified after it was reported the Peixe president has talked about the proposal with the player
The 28-year-old is said to be keen to rejoin the Brazilian outfit in what would be his third stint at the club.
Despite having a contract with Milan until 2014, Robinho's stance has left Ribeiro hopeful a deal can be struck with the Scudetto runners-up.
"We chatted for a long time on the phone as friends, both about family and personal matters," Luis Alvaro confirmed to Lancenet.
"However, I admit to inquiring about the two-year contract he has remaining in Italy, and the possibility of a loan move back with us.
"Nevertheless, it still will be a very difficult deal to strike with Milan. Our objective is not to sow discord with the club we have an excellent relationship with."
Robinho is two weeks into his month-long holiday in Brazil, following the end of his Serie A season with the San Siro giants.