I'm disappointed in Djokovic's comment in his press conference afterwards >
"Actually, it gives me great joy to know that I can't get worse than that, than what I played today."
It's a bit disrespectful to Simon that he wouldn't view it for what it was: an in-form Simon doing exactly what he does best - frustrating his opponents into errors by not giving them the patterns and opportunities they're used to in most matches they play. That wasn't really a bad performance by Djokovic, it was Djokovic taking ages to overcome Simon and having almost no answer to his style of play other than banking on being a fundamentally better player in the end. Tons of players have faced Simon and experienced a day like Djokovic did - Federer included. It's just Simon's brand of extremely smart tennis against players who outgun him shot-wise.
As an added comment, Federer was asked last night about the Djokovic-Simon match and he had this to say - he sums it up perfectly re: Simon's effect on opponents.
Q. We haven't seen Novak play like this in a very long time.
In like what sense?
Q. Hitting a hundred unforced errors.
Yeah. How much did you see Gilles Simon play? I'm just wondering, because I think people miss the point of him. He plays every match, like, that. He makes you miss. He makes you go for the lines and he runs down a lot of balls. A lot of points end in errors, if you like. . . . People just kind of talk maybe -- it's my assumption, I'm not surprised you're asking me. I just feel people talking like he had a horrible day. Of course he can play better, but on the other side, you have somebody who has the fastest legs and he knows exactly what he's doing out there, and it worked almost to the very end. So it was very close for Novak, and he knows that.