Rafael Nadal has requested for all of his drugs test results to be made public by the International Tennis Federation.
The 29-year-old has been forced to deny doping claims on a number of occasions throughout his career, and on Monday took legal action against former French minister Roselyne Bachelot, who claimed that the Spaniard's seven-month injury layoff in 2012 was "probably due to a positive doping test".
Nadal has now written to the ITF to make his records public, while the Federation has told him that he is free to do so himself as well as confirming that he has never failed a drugs test.
"It can't be free anymore in our tennis world to speak and to accuse without evidence," read an excerpt of the letter, according to PA.
"Please make all my information public, please make public my biological passport and my complete history of anti-doping controls and tests.
"From now on I ask you to communicate when I am tested, and the results, as soon as they are ready from your labs."
Nadal is a 14-time Grand Slam champion and on Sunday equalled the all-time record for clay-court titles, claiming the 49th of his career at the Barcelona Open.