A commenter notes this from the ITF press Release:
Mr Odesnik asserted that he had purchased the human Growth Hormone on professional advice to treat a recurring injury, and that he intended to apply for a therapeutic use exemption prior to using it. Mr Odesnik denied ever using any of the human Growth Hormone.
The ITF has no evidence to contradict that denial, but Mr Odesnik did not in fact obtain or apply for a therapeutic use exemption for the human Growth Hormone prior to obtaining it. Accordingly, Mr Odesnik’s possession of the human Growth Hormone is an anti-doping rule violation under Article C.6 of the Tennis Anti-Doping Programme.
This begs the question: Are there players who have actually managed to finagle a therapeutic exemption for HGH?