To make it easier for you....pick up a racket and maybe you will learn something about tennis. Meanwhile you sound as smart as Gulbis with a racket. It makes perfect sense that you're a Fedull fan. Moonballing doesn't exist in the modern game. Bruguera was a real moonballer, try watching some videos, and talking of the current players Fed's backhands can go really close to the moon.
To answer the OP's question, hopefully never, for the sake of the sport. We don't need more arrogant no.1 with no balls and an arrogant fanbase. Tennis will be a classy sport with classy fans once Fed retires and the likes of Nadal,Djokovic and Del Potro dominate the game while they and their fans respect each other.
Nadull game has changed,,because he matured & realized that to extend his career (protect his knees) he had to shorten points. Running for hours n' hours takes its toll. In essense he gave-up his explosive movement he had in his younger days, for a more rounded game , so he gradually increased his mph on serve over time,improved his volley skills etc etc. However his overall game hasn't improved in term of results with reference to addressing his fundermental weakness. He beats the players/styles he always beats & loses to the players styles he always lost to with respect to surfaces.
People claim he improved his grass game/HC game etc but if you look closer you will see the HC slams he won ,the draw was filled with player he would always beat,the same for grass n' clay.
He is playing closer to the baseline now,,so what.
Despite his improved results I could claim he is in fact declining currently.The pattern in there.
The law of nature,only the strong survive.
THE GREAT TACTICAL RIVALRY OF THE OPEN ERA
FEDERER 10 VS TONI NADAL 20
ADVANTAGE TONI NADAL
RAPHEAL NADULL,A PRETTY FACE & MUSCLE
Fed 2 nadull 13 fed is nadull CLAY TURKEY. THE REAL ERA 2003-2010.