No one needs a lesson in what serving well does for a player. What you neglect to comment upon, and no amount of prodding will bring it forth, is everything else Novak did wrong to lose that match. As I've said, his game isn't predicated on his serve alone, by a long shot.
IT'S NOT ABOUT EVERYTHING BEING PREDICATED ON THE SERVE ALONE. THAT IS NOT THE ARGUMENT.
The point is that the other aspects of your game are going to be much more suppressed and not as able to flourish when your opponent is serving a full 33% higher than you. This is what I always said about Nalbandian as well. No matter how good he was from the baseline, the truth is it is very hard to consistently overcome 50% or worse first serve days (and Nalbandian had a problem with double faults too, which Djokovic does not).
How are you going to take control of points if you're serving at 43% while your opponent is serving 76%? And if you don't take control of points, how are you going to develop confidence or rhythm in the match?
The point about bad first serving numbers is that they can hold back everything else that is great in your game. Believe me, I would know as a Nalbandian fan. That was his chief problem.
Once again, sorry, but you're always nattering on about sets and games in long matches. Even if Roger had won that first set, there is no assurance he'd have won the match. He's never even taken Nadal the distance at RG. You really stretch points beyond where they break. You're the guy that still thinks Medvedev lost the USO last year when he had Nadal "on the ropes." You are so far beyond reasonable tennis analysis when it comes to Nadal, and it's apparent to everyone.
No, Medvedev absolutely did have Nadal on the ropes. Nadal was wobbling around with his legs shaking, and he was also shocked that the match had extended as far as it had. Medvedev had all the momentum at the start of the 5th and pulled his punch. And ever since I told you that Medvedev has a serious mental problem when it comes to closing out matches, you have seen him lose matches repeatedly after having a lead (most notably at the World Tour Finals last year, which crystallized my point so clearly that you should have been able to see it).
Nadal was flailing at the start of the 5th and Medvedev simply did not deliver the knock-out blow. It was very similar to Djokovic in the 3rd set of the 2013 US Open final.