For Rafa's grass standards, its a tough group.
If you take it that way, anything is hard because of his "grass standards" so the conclusion is that any opponent is hard.
But seriously, he's vulnerable against the big hitters- Raonic, Kubot, Veselý?
Grass is different when it comes to big hitters, this is a fast surface with a low bounce, no time to give it the atomic bomb, at least until the terrain becomes balder, that's when Rafa gets its advantage back anyway.
I'm expecting an early loss to Rosol or F Dancevic.
Rosol can beat him simply because the common perception is that anybody can, but he isn't any special grass, he the match of his life in 2012 in a similar characteristic to Soderling's style of "all or nothing" but overall, just like any continental European player, his philosophy is linked to clay, slow surfaces, he ain't gonna achieve much on grass.
Compare that to Federer. Llorenzi followed by a qualifier. Its like the further he falls down in the rankings, the easier opponents he gets.
Paolo Lorenzi is a 100% clay courter, remember when he had 1-0 with Rafa in Rome, overall he's modest but on grass he's nobody, don't know if he ever won a grass match in his life.
Gilles Muller, the qualifier, is def. a harder opponents than the italian, he had some good games on grass, one against Nadal he lost 7-6 7-6 6-0 in '11 ( remember, Rafa's most dominant year all the way to the finals lost to Novak on a roll ) and likes fast courts but he's old, oh wait, so is FedEx, at an age I don't see Nadal stepping on a court unless it's a game with Bahrami having some fun. On the other hand he has clay courters for the 3rd round, but that's because Mahut lost in the 1st to Pujol, surprising.
Anyway, I don't care who wins this one, I generally like Wimbledon but since it's a World Cup year, will mostly wait for the QF. I would like Stan to confirm his good year and that single handed backhand on his that is one of the best in history.
Can't say I wouldn't like FedEx to snatch another, though, hard, this isn't football, top player were out by 28 or 29, he wants to be there in Rio for the Gold Medal FFS! Never was his biggest fan but nobody can really hate him and no appreciate he is still here to entertain.