I think you are looking too much into it, simplet. Sure, he is not at 100% physically, sure he is playing solid at best, average at worst, and sure, he is not showing an incredible concentration in his matches so far (doesn't run on all balls sometimes, and running like a rabbit the rest of the time), but in all of these points, this is just the nature of the fool.
It was exactly the same last year between the pitiful losses against Federer (who he was litteraly watching playing against him btw ) or the pathetic match against Benneteau in semi-final at Lyon, and all of his matches at Bercy, particularly the one against Blake where he was blasting him off court. You can't expect him to always be creative or perfect on a court. He is doing with what he has and what he can at a definite moment. Plus there are some trend in his plays : always been average at the beginning of a new tourney, but solid when it matters, always resting on his serve, but firing aces after aces when he wants it. He also takes time at the beginning of a match to read his opponent serves and his game, to finally roll on him once he knows him (cf Djokovic or Tursunov today). You also have to remember that he needs many matches to start the engine.
On court, I think he is the same raging beast he was at bercy
( and the reason why we like him so much
On the match : he was average at the beginnning, but firing at the end (see
). Tursunov was also lucky a decent amount of times on his volleys and really solid off his serves, not much when Jo has him on his pocket at the end.
The match against Nadal is quite the unknown quantity IMO. If the match up is obviously on Jo's side, I think it's a pride thing for both of them. Nadal can't lose against Jo for his status and for his pride, Jo surely badly wants to beat the world number one. The question is how much energy Jo has saved after 6 consecutives win and 6 full weeks of competition, and how much is he going to power up before tomorrow like he always do for the big matches
Answers tomorrow at 19H30 local time.