I am watching the development of the similar Söderling story. Robin also had an undefined 'medical condition' that forced him out of the sport just after winning Swedish Open July 17, 2011 (ranked #5 in the world, no less).
Of course, the official statements about the 'medical condition' that has be spouted since then borders on complete idiocy.
So I'm just waiting for the miraculous recovery that will be announced late July 2013
Nadals sudden return to the game made me go "hmm". I applied the
Söderling analysis to the similar Nadal case.
When did he return to competitive tennis?
Where and why not Australian Open?
How long ago was his last competitive game?
Everything lined up
perfectly
So, sorry, no inside scoop.
Edit:
It seems I'm not the only one making this connection...