Nadal filed a lawsuit against former French sports minister Roselyne Bachelot yesterday after she accused him of covering up a failed drugs test.
"It is necessary that our sport becomes a flagship in a world where transparency and honesty are two pillars of our conduct and way of living," Nadal wrote in the letter addressed to ITF president David Haggerty.
Bachelot alleged that Nadal, one of Spain's most loved and admired sportsmen, faked an injury in 2012, when he missed the final six months of the season due to knee problems, in order to hide a positive drug test.

Nadal has never failed a drug test in his many years on the ATP Tour and has always vehemently denied ever using a banned substance.
"I believe the time has arrived and our sport and our governing bodies need to step up in communicating well to the world," Nadal's letter continued.
"I know how many times I am tested, on and off competition. Please make all my information public. Please make public my biological passport, my complete history of Anti-Doping controls and tests,” he added in the letter.

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