1. Ignacio Truyol
Tested positive for the steroid Nandralone (and the stimulant pemoline) in 1997
Claimed his doctor prescribed it for “back problems.”
Highest rank: 127
2. Sesil Karatantcheva
2006, tested positive for Nandralone at age 16. She received a two year ban and has now resumed playing. Highest rank: 35, quarterfinalist at 2005 French Open.
3. Juan Ignacio Chela
Tested positive in 2001 for methyltestosterone. 3 month suspension and $8,000 fine. Still active. Highest ranking: 20th in 2007.
4. Guillermo Coria
Tested postive in 2001 for Nandralone – 7 month suspension (click his link for more details).
French Open runner up in 2004
Highest Ranking: 3
5. Bodhan Ulihrach
2003 tested positive for Nadralone – Received no fine or suspension (click link for more info)
Biggest Achievement: Runner-up to Michael Chang at Indian Wells in 1997 (Beat Sampras enroute)
I believe he is still active.
6. Greg Rusedski
Tested positive for Nandralone in 2004. No fine or suspension (Click his link for more details).
Highest Ranking: 4
Retired in 2007, but recently announced comeback.
7. Petr Korda
Australian Open champion, 1998, tested positive a few months later at Wimbledon, received 1 year ban. Retired.
8. Wayne Odesnik
Caught smuggling HGH into Australia in January of 2010.
Reportedly will receive a 2 year ban.
Highest ranking: 77
The Magnificent Unnamed 7
The Other 35?
* Let me add that there have been several players who tested positive for other substances, such as stimulants, and I do not address that here except to note that steroids are not the only performance enhancing drugs being used by tennis players.
Update: Click Here for a list of players who tested positive for something other than steroids.