Rafael Nadal has denied he has ever used a banned substance to get an edge or to speed up recovery from injury.
Asked for his reaction to Maria Sharapova's failed drug test, the 14-time Grand Slam champion took the opportunity to address speculation he has used performance-enhancing drugs
The Spaniard, 29. said he was "a little bit tired" about the rumours, adding: "I am a completely clean guy.
"I have never had the temptation of doing something wrong."
Nadal added: "I believe in the sport and the values of the sport.
"The sport is an example for society.