We know they dont want to sell him, they rejected 50m or whatever like their CEO said. If Sandro asks to go, it'll happen. Thats what is needed. Simple as that. If he says i want to go to Chelsea, we'll get him.
"We have no intention of selling anyone, but if a player decides to leave, as has happened in previous years, then at the end of the day he has to go, because we don't keep anyone against their will.