Greg Rusedski can look forward again after being cleared of a doping offence.
BBC Sport looks back at how the scandal broke - and the key developments that ended with Rusedski's victory.
9 July 2003
The Association of Tennis Professionals clears seven players who have tested positive for nandrolone.
Rusedski has endured the most difficult nine months of his life
The ATP says it cannot be sure that the tests were not the results of contaminated electrolyte supplements given out by its own trainers.
23 July 2003
Rusedski takes the drugs test that will see him test positive for nandrolone.
9 January 2004
After weeks of rumour, news breaks of Rusedski's positive test.
"In response to media inquiries, I can confirm that a sample has tested positive for a low level of nandrolone," he says in a statement.
"I fully expect to be found innocent. I do not and have not taken performance-enhancing drugs."
Rusedski says the ATP's handling of his case is "wrong, unfair and discriminatory".
But his former coach Pat Cash is not supportive. "Unless there are extreme circumstances, I think he will find himself out of tennis for a year," he tells the BBC.
The World Anti-Doping Agency says it is "concerned and disturbed" by elements of the ATP Tour's investigation into the positive tests for nandrolone.
Petr Korda, who was banned for one year for taking nandrolone, says Rusedski will be tarnished forever.
Rusedski claims he has the support of his fellow players as he fights to clear his name.
"I have been very encouraged by the reaction I have had - they have been very positive and sympathetic," he says.
The following day he beats Juan Ignacio Chela in the Adidas International Sydney in his first match since news of the test first broke.
Support continues to grow for Rusedski.
Tim Henman tells BBC Sport that his gut feeling is that his Davis Cup team-mate is "clean", while Rusedski's former coach Brad Langevad says Greg was a "perfectionist" who would never take a banned substance deliberately.
Czech player Bohdan Ulihrach, cleared of testing positive for nandrolone last year, also offers his support.
A dominant display by Albert Costa ends Rusedski's hopes in the first round of the Australian Open.
Costa gives Rusedski his full backing. "He's not the kind of player who needs to take anything" he says.
"Everybody's afraid - everybody is talking. My feeling is that you can't even drink electrolytes."
British Davis Cup player Martin Lee tells BBC Sport that ATP trainers had offered him supplements after matches with no mention of the possible risks involved.
Professor Ron Maughan, the world's leading expert on nandrolone, says it is "staggering" that the ATP could still be giving out potentially-contaminated supplements as late as 2003.
Rusedski exited at the first round stage of the Australian Open
"It's like a long-distance lorry driver saying that he didn't know about speed limits," Maughan tells BBC Sport.
"It became public knowledge that the list of supplements under suspicion included electrolyte replacement drinks."
Rusedski's anti-doping hearing begins in Montreal.
Rusedski appears before the three-man tribunal accompanied by his lawyer Mark Gay.
"I am driven by the fact that seven other players with identical findings of metabolites of nandrolone and the same unique fingerprint were exonerated," he says.
Rusedski flies back to London and tells reporters he is "cautiously optimistic" of avoiding a ban.
"I'm confident, but all I can do is sit tight at the moment," he says.
Rusedski pulls out of the Rotterdam tournament, fuelling speculation that he fears he has lost the battle to clear his name.
Spain's Alex Corretja says he would join a player boycott if Rusedski is banned.
Corretja claims Rusedski is backed by most players and says: "I'd sign a petition for him."
Rusedski's nightmare is over as he is cleared by an ATP tribunal.