I started wondering... Maybe, after our efforts to sign Sandro, there was a mutual agreement between the clubs to sell Sandro to Chelsea next summer. They did a similar thing with Pogba before his transfer to United. We did a similar thing with Diego Costa. Remember how Mourinho was confident of the Costa deal during 2013/14, despite the fact we had not signed another striker, just a stop gap in Eto'o?
So maybe