http://www.tennisworldusa.org/news/news/Novak_Djokovic/41267/novak-djokovic-tennis-is-not-my-no-1-priority-anymore-/
This happens to all tennis players when they get married, have children, and find these responsibilities competing with their tennis. Something has to give and tennis is often the thing that must see less effort simply because before that it was all consuming.
Good for Novak. He is seeking balance. Fed did the same thing as many others before them.
