Robinho, 24, said: "I don't know where I am going to continue my career. The season is starting now and I have offers from other clubs - one of them is Chelsea. But nothing is certain. We're in talks."
Real refused to let the winger join up with Brazil's Olympic team.
And Robinho added: "It's very bad for me to have to watch Brazil's Olympic team on TV.
"My will was to be with the rest of the group but Madrid did not want to allow me. I am very sad."
Chelsea chief executive Peter Kenyon insists the Blues will wait until the end of the window.