Couple of questions: Did Medvedev play crazy good v. how much was Djokovic off? Basically same question for Nadal v. Pella, at least the first set.
Medvedev never plays crazy good. He plays always rock solid, sometimes insanely rock solid. But he played well, for sure. Djokovic always seemed that he was about to turn up the gears and take control of the match, but once the third set came, he simply lost the plot. He had at least two different plays going on for him, moving Medveded out of position on the forehand side, and the drop shot, so at some point it seemed that he was in total control... but all of a sudden, two games of the third set goes by and he starts missing one shot after the other.
As for Nadal and Pella, very good match. Pella was really outplaying Nadal in the first. He was serving and had game point to go up 5-1. I guess it was after the second deuce, but I said out loud, before the game-point: "match point Nadal". I was damn sure that if Pella could not convert that game point, the match would quickly escape him from there. He actually fought harder than I anticipated after that.
Nadal is showing very good defense, but on offense he is kind of on and off. At patches a lot of UFE's just came in out of the blue.
@Denis, thanks for the remark about the serve. But I am honestly still under the impression that when the new service motion came in, it was much more "compact" than what we are seeing now. If you say it is not the old one, I believe you, but maybe something from it just morphed into the new one.