Well, well, well...What do we have here?
The Tennis Space website has just conducted a interview with Dr. Stuart Miller. Published today, no less.
One of the questions asked was: "It’s been suggested that you believe that taking prohibited substances would not give you as much benefit in tennis as in other sports?"
I can't help but wonder why this interview happened at this particular time...well, maybe I can think of three reasons (here, here, and here).
Give the interview a read, and feel free to use the comment option there.