CAMELOT FANTASIES

very impressive general masterclass.

I noticed that he wont give up any space (court) even in practice.

You're right, not much general. 

He knows what you and I know.  You have to make the opponent have less time to react, especially on hard court.  So returns and rally shots have to come back quickly, deep, and close to the lines. 

This is what Djokovic and the top guys have been doing consistently the best from both wings, which is why he is 4000 points ahead of Federer, who is close to 2000 points ahead of Murray, who is 2000 points ahead of Wawrinka and the rest of the field.

It takes a lot of practice, hard work, to get that level of play against the best in the world.

Respectfully,
masterclass