ah... u are very pessimistic...
last year he performed better on grass
so...let's hope for the same thing this year!
Last year he was injured during large parts of the clay season and the grass was also mixed: There was a tournament win in Nottingham, but two early defeats: 1st round Wimbledon, 2nd round Halle, one has to admit, though, that the opponent in both cases was a certain..... Roger Federer. Due to his much better ranking this year, he won't draw Roger at very early stages of grass tourneys.
And I have nothing against meeting those two in finals.