His appeal was unsuccessful.
The International Tennis Federation confirmed this Friday the suspension for 15 months of all competitions of Stéphane Houdet.
Decision taken by an independent tribunal, in conjunction with the world tennis anti-doping programme.
After 3 failed checks in 2021, the three-time Paralympic doubles champion was suspended for "negligence" on December 27.
Since 2009, the tennis player was part of the athlete monitoring program.
Stéphane Houdet, 51, winner of 23 Grand Slams between 2007 and 2018, hoped to have the validity of 2 of the 3 failed tests proven in front of the judges, but he was not heard.
The Frenchman had continued to play on the circuit after his call.
Eliminated in the quarter-finals in singles, and beaten in the semi-finals in doubles at Roland Garros in June in particular, all the points won by Stéphane Houdet since his first conviction will be canceled.
His suspension runs until March 2023, so he will be able to push back the Parisian clay courts during the next edition.