Just a couple of other observations:
1) Lot of discussion on serve. For the total match, Djokovic's first serve % was at 67% versus Nadal at 65%. Djokovic's serve was CONSISTENTLY faster than Nadal's as well.
Nadal won 67% points on first serve and 68% points on second serve
Djokovic won at 50% first serve and 55% second serve respectively.
That stats alone says why Novak was broken 7 times in the match. In the 2nd and 3rd set, Novak served OVER 70% first serves and still got broken multiple times.
If you are serving faster than your opponent and when your serve lands in and you win only HALF the points, that's BIG trouble. It indicates your opponent dominated every part of the groundstrokes in the match: most of the rallies, the return games, serve-plus-one, etc. Which brings up the 2nd pt..
2) Even more important - evolution of Nadal's game on clay. It is CRITICAL to understand this since it differs from the past. If we look at Nadal's matches since 2017 we see that (in general) his winning % in shorter rallies is much higher than his winning % in longer rallies. In the past, Nadal would usually make it a war of attrition and win the longer rallies against most opponents. Now, with age however, it is the reverse. For instance, in RG 2020 Sinner, Schwartzman and Djokovic won more points on longer rallies (more than 4 shots) than Nadal did.
Rafa does the MOST damage in the serve+1, return+1 or 0-4 shot rallies. He tries to take a forehand ASAP in a neutral rally and takes a big cut on it.
This was especially true in the match vs Novak. As I pointed out before, 53-25 in the “First Strike” 0-4 shot rally length -- in favor of Nadal. That's a lopsided domination stat. In fact the longer the rallies went, the more Novak won them. In short, Nadal is not a talentless hack who is just defending and outlasting his opponent. In fact that's not a viable strategy at all, since the longer the point goes the shorter Rafa hits and he usually ends up losing a lot of them. (Moves slower than before, less explosive etc etc).
Finally - what could Novak have done to avoid being beaten like this? For one thing have a better strategy. Rope a dope tennis (dropshot/lob/dropshot-putaway) won't win matches vs Nadal. He would have been better of taking chances earlier in the rally so that Nadal could not step in and take it on his forehand. Djokovic was also standing way back to return Nadal's serve. That doesn't make any sense. He should have stepped in and returned aggressively deep into Nadal on the baseline. True, Nadal would have probably won more cheap points on serve. But standing back and floating a return only meant that Nadal took control of the rally and ended most points in less than 4 shots. One reason why Sinner seemed to have more success vs Nadal than Novak did (as preposterous as that sounds)..