Cyclist Tyler Hamilton tested positive for DHEA, a steroid-related hormone that is readily available over-the-counter. He gives the usual "blah, blah, blah - I didn't realize" type excuses, but this is his second positive drug test, so of course he knew what he was doing. I know this is cycling and not tennis, but I think it is relevant for a few reasons:
1. DHEA is tough to test for and shows that these athletes will use PED's if they think they can get away with it.
2. This is a sport in which endurance and strength are both important and demonstrates again that steroids are used in such sports.
3. The fact that a person tests positive does not seem to be a deterrent from cheating again.
4. It shows that the drug testing is catching up with some of these athletes.
I expect with WADA on board this year for drug testing we will see some tennis players caught this by the end of this year.