I'm still confused because it wasn't so along ago people were saying he's an Atletico boy he'd never go to Real. Now all of a sudden that's gone out the window and everyone is regarding it as a rather likely possibility.
Losing him would hurt big time but if I was him I'd think twice before joining them, he'd sacrifice any bond with Atletico and be at risk of being the victim of awful fans at Real Madrid if he doesn't perform.
Its because he's gone via United. I suspect what's driving him is that his family is in Spain, and his girlfriend.