This was one of the the biggest upsets in the history of tennis. Nadal was definitely not in shape. He was making a lot of bad placed shots and unenforced errors. I think that his opponent literally had no skill compared to him and that Nadal was just frustrating himself. We all also know that Nadal was never his best on grass. These combined elements costed him the entire match and a big loss of self confidence.
Image by Saach.tv
Image by Saach.tv