His perf in the final was good of course, but the first set score didn't reflect the closeness of the set, and he was coming in fresh ; had he been forced to battle Tsitsipas or Thiem in the semis, and it was Novak who played Schwarzie, it could have been a very different story all together in that final.
If a youngster like Zverez, able to blow him off the court, manages to push him to a fifth set Rafa will have to battle not only father time but also his increasingly falling nerves.
I believe it's the draw that will decide the winner of RG 2021.