http://news.bbc.co.uk/sport1/hi/tennis/7073033.stmMartina Hingis has retired from tennis after revealing she tested positive for cocaine at this year's Wimbledon.
The Swiss star denied ever taking drugs and said the accusations against her were "horrendous and monstrous".
"I have tested positive, but I have never taken drugs and I feel 100% innocent," said the 27-year-old former world number one in a statement.
"The reason I have come out with this is because I do not want to have a fight with anti-doping authorities."
Hingis, a five-time Grand Slam champion and former Wimbledon winner, lost in the third round at the All England Club to Laura Granville.
She then underwent a routine drugs test, carried out under the auspices of the International Tennis Federation (ITF).
Her statement continued: "When I was informed I had failed my 'A' test following my defeat at Wimbledon I was shocked and appalled.