WADA president John Fahey sent out this message in a statement from WADA as a strict anti-doping programme has been set up for the July 27-August 12 Games.

“I say this in the clearest way possible: if you are a doping athlete and you are planning to compete in London then you must withdraw from your Olympic team,” said Fahey.

“Doping is cheating, plain and simple. A doping athlete cannot achieve success, it is a complete contradiction,” he said.