I didn't know he agreed on 20M with Juve beforehand. I was under the impression that his fee is being negotiated between him and both clubs.Erm, that's really not how big deals work.
Why is he greedy? He made a deal with Juve and expects them to honour that deal. Seems pretty fair to me.
Anyway what I meant is no matter how greedy him or Juve may be, they are not stupid to walk away from a deal like that.
This and the fact that Juve already spent 100M on Higuain makes this a done deal in my eyes.