Ebrahim has yet to fill out a bio.
A B/R reader Advait Halve, who is very sharp, just sent me this article link detailing Rafa's scaphoid tarsal bone in his left foot, which may be what is threatening his career. Here is the link: http://www.theaustralian.com.au/sport/nadal-on-brink-of-oblivion-as-his-greatest-fear-arrives/story-e6frg7mf-1226452902007
I had briefly mentioned this tidbit in the book review I did on Rafa a few weeks ago. His autobiography gives 4-6 pages of how this injury originally almost ended his career seven years ago...http://bleacherreport.com/articles/1292248-rafael-nadal-how-rafa-is-unique-insight-of-a-tennis-superstar
Thanks for your continued comments, interest and support of my articles. To answer your Rafa questions, I've done some digging and it's hard to find anything I could use and stand by regarding his injuries.
You have a great point about his status for advancing at Wimbledon. The way I understand this is that Rafa has been taking knee injections that will get him through a particular period--a couple weeks to a month. So, it's likely he had some injections to get him through the clay-court season and then Wimbledon. He's been doing this at least since 2010, according to his own book. He also detailed how each time is a risk. While he can play through it, he is undoubtedly doing more long-term damage. Perhaps it's really caught up to him, or he needs even more time to try and get natural and real healing before moving forward.
Again, I'm theorizing, but if I could get accurate information I would look to publish an article that explores his issue....