I don't know about that. I mean I know what you are saying but Liverpool sold us Sterling the year after we pipped them to the title, Chelsea sold Matic to United last year, Arsenal did the Sanchez-Mkitharayan deal, United sold us Tevez a few years ago now. I do understand it's a bit of a long shot, but there's been a lot of deals between premier league rivals in recent history and Mourinho in particular has shown he is willing to sell to direct rivals if the price is right.
I do acknowledge it's a long shot but i think we could test the waters and see what happens.