This is a guy who over the last 4 seasons has scored 22, 23, 27 and 21 non-penalty goals, while being a tactical nightmare for his managers, a too-big shadow for his teammates both on and off the pitch, contributing little to his teams outside of goals and over the last 2 seasons failed to even be a catalyst for success
Mind you, those are still good numbers and you have to think in a good, functional team, he can still be a big contributor to success. The problem is, how much is a guy like that worth? Certainly not even close to what he's currently on. So how far is he willing to go, to leave?
If he leaves - and at the moment i don't see it - it will be in the last days of the window, like last season, probably for surprisingly low(for him) wages, and to a second-tier CL side, like Dortmund or Napoli.