I know what you mean, and that's one of the reasons I wish this was all on the table...in all sports. Let's not delude ourselves about pro sports, or the olympics....and face up to reality, and decide how to procede. It's not as though it can be eliminated even if we acknowledge it...but ignoring it, or burying our heads, that just makes us....morons!
I once head a former scientist involved in testing talk about the only method he could see working...give up trying to detect the drugs...they're(the atheletes) too far ahead of the tests...and go with a baseline physiological monitoring system, where the norms and baseline from the athlete become established so that marked deviation can be noted, rather than trying to detect the substances themselves. Problem; nobody will go along with his system. The only way would be a paradigm shift through sports and a serious commitment to go drug free. Of course, this might mean going backwards a bit in terms of performance! Not what pro sports wants to hear!
As for tennis, I'd still like to believe top 100, or even top 10 is possible drug free...this is ONLY because of the very high skill component in tennis. I don't think this is the case in the VAST majority of pro sports now. On the other hand, increased speed, strength, endurance, recovery etc.....wow, a 5% increase in one of these means a LOT in pro tennis. Billy Jean king talked about a woman who used back in her day, now we know Mcenroe used, Becker implicated Lendl and Muster, Rusedski, Korda, Coria, and about 50 others have actually tested positive, entire teams disqualifed in the tour de france, track and field coaches admitting they doped every athlete they ever worked with....you really have to be a true believer to think it doesn't happen in tennis....A LOT....why? The honor system? All the psycho tennis parents, players driven since age 5 to be a pro, journeymen struggling to eat from all over the world...and they aren't using because they've all independently decided it's "cheating"? LOL. The premise is laughable. The mind set for many athletes is that: not taking would be cheating themselves. Why should they lose their chance when others around them are using?