"In the case of a “guilty verdict,” the charges go public whether the accused is Rafael Nadal or an unknown player ranked 500th in the world according to Miller, who has headed the ITF anti-doping arm since 2006."
"So a silent ban may be an impossibility. Unannounced provisional suspensions, however, happen all the time. Though unlikely, Rafael Nadal could conceivably be serving such a suspension."
At worst, he could be suspended from playing because he is under investigation or fighting an allegation.
However, it could be his arm, or he is really a member of the CIA and is on a mission right now...this type of speculation is ridiculous, and I am just not one of those people who who believes something simply because it has not been proven to be untrue. http://en.wikipedia.org/wiki/Argument_from_ignorance