Last year Simon was forced to retire in the 3rd round against former finalist Ferrero due to knee injury, and the year before that he lost in the 3rd round to Del Potro in 5 sets.
Edit: didn't reply fast enough
Added Ancic to the list.
Any chance Gilles might give Nadal some potential trouble in the third round like he used to in 2008? It looks like the injury problems are finally starting to work themselve out. He did well at the Legg Mason making the QFs and pushing Nalby to three sets, and although he lost in the first round in the Cincy Masters, it was to the eventual finalist Mardy Fish in a highly competitive match 6-7(4), 5-7. Some might recall he took Andy Roddick out of the Legg Mason in straght sets.
Donald Young is great first round opponent. Kohli is tough, but has been suffering some injury problems himself recently. I could easily see a third round clash with Rafa.
Is he flying under radar right now; with the potential to pull off a major upset?
It's not like he couldn't do these things in the past and he is excellent at keeping just more shot in play which is why he has been so frustrating a player for the top seeds.