The most interesting tennis shot that does not go over the net in the match

Have anyone seen this tennis shot before and it is considered as a score? This is like one of the most interesting tennis shots as the ball does not drop in as a conventional point which is usually done over the net and instead it goes from the side. 

 To even score like this requires great precision and skill. Roger Federer seems to be the only that had scored like this. Sometimes you could have win many trophies but it is also shots like these that shows a great athletic move that makes you one of the great athletes around also. 

When Roger Federer did that the opponent smile and together with the spectators they can only admire the Roger Federer's shot once again.