he used to be able to attack from that far back as a result of the technique he had to change due to the wrist injury - and i think struggling with motivation he hasn't been in that great shape either - i mean he looked more unfit than Stan ever has to me when i saw him shirtless last, and Stan gets called fat all the time.well, saying it is the wrist is the easy solution. following all his matches you can clearly see his worse movement and how he is playing from further back and not moving inside the court anymore. i doubt thats a wrist problem.
in addition to that he plays very poorly on important points and games. i guess its a deadly combination of a lot of factors.
nevertheless he gave us (us austrians especially) a lot of nice tennis moments and he can play as long as it is fun for him.