It involved top East German sprinter Katrin Krabbe, who was exposed as a drug cheat while preparing for the 1992 Barcelona Olympics at a training camp in South Africa.
Singapore Athletic Association president Loh Lin Kok remembers the controversy well.
He was a member of the World Anti-Doping Agency (Wada) that banned Krabbe and two other teammates, Grit Breuer and Silke Moller, for using clenbuterol, a drug that increases aerobic capacity.
He recalled: 'Krabbe and her buddies filled drug-free urine samples in condoms.
'And they hid the condoms in their vaginas, which they would then remove during the dope test to fill the sample bottles.
'They were caught after lab tests confirmed the drug-free sample all came from the same person, who happened to be their coach!
'Krabbe thought she had got away by providing a clean sample, but we banned her for two years on grounds of unsportsmanlike conduct.''
The tall and beautiful blonde had gained fame at the 1991 World Championships in Tokyo, where she won the 100m and 200m events.
According to Loh, who is a legal counsel for the International Federation of Bodybuilding and Fitness and also the Asian Athletics Association, other creative ways of dodging urine tests involved using the armpits and the buttocks.
He said: 'Over the years, some male athletes have hidden condoms filled with drug-free urine in the anus.
'They have also used a contraption hidden between the buttocks and armpits which will pump clean urine samples when squeezed.''
Since Krabbe's sensational method for evading the drug-net was made public, Wada has been even more stringent during urine tests.
Loh said: 'Today, all athletes must sign an agreement to allow anti-doping officials into the toilet to witness the entire urine test.
'It's an intrusion of privacy but, with some athletes resorting to such cunning ways, officials have no choice but to watch them like a hawk.'