Disgraced Tour de France winner Floyd Landis said the decision to clear Inigo Landaluze of doping because of testing errors strengthens his own case.
Landis and Landaluze both tested positive for testosterone
Landis tested positive for testosterone but has always claimed the analysis by the French laboratory was flawed.
Landaluze's result came from the same lab but he escaped sanctions when testing irregularities were discovered.
"The track record of scientific misconduct at Chatenay-Malabry seems to grow by the day," said Landis.
"The Court of Arbitration for Sport decision to clear Inigo Landaluze on the basis of violations of testing procedure... strengthens my contention that the tests conducted on my sample were handled in an incompetent fashion and analysed on the basis of flawed science."
The CAS admitted that the same person analysed both Landaluze's A and B samples, in contravention of the established practice.
If the 31-year-old Landis is unsuccessful in his quest to have the doping charges dropped, he would be the first Tour de France winner stripped of his title.
"Going through what I am now, I feel personally for Landaluze and hope that everyone recognises that it has taken him 18 difficult months to clear his name from what was revealed to be a grievous error," Landis added.
Earlier this month, American Landis admitted his career could be over after the failed test.
"There's a minute chance of me racing again in 2007. Even if I'm not suspended, who'll want to sign me?" he said.
"If they suspend me for two or four years, it's over. As things stand, I don't see myself as a bike racer."
Landis - whose father-in-law committed suicide shortly after the news of his positive test became public - told Belgium newspapers Het Laatste Nieuws and Het Gazet van Antwerpen: "Even if I'm proved innocent, my reputation is ruined.
"This whole affair has ruined my life.
"My father-in-law committed suicide. There must be a link to what happened. He was my best friend and my biggest supporter.
"I've never taken testosterone, I would have been stupid to because you just can't get away with it (in doping tests).
"What it comes down to is that I'm being accused of stupidity more than doping."