Fourteen-time Grand Slam champion Rafael Nadal has asked for release of results of all drugs tests to public that he has taken in his career. He made the demand in a letter to the International Tennis Federation yesterday. Nadal filed a lawsuit against former French Sports Minister Roselyne Bachelot on Monday after she accused him of covering up a failed drugs test. In the letter addressed to ITF President David Haggerty, Nadal said it is necessary that the sport becomes a flagship in a world where transparency and honesty are two pillars of our conduct and way of living. 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. The ITF acknowledged receipt of Nadal's letter and confirmed he had never committed a doping violation, while inviting the Spaniard to personally make his records public.