Floyd Landis has put forward his case for the US Anti-Doping Agency to dismiss the doping charges against him.
Landis could be stripped of the Tour de France title he won in July
The American tested positive for unusual levels of testosterone after winning stage 17 of this year's Tour de France - an event he went on to win.
Landis' lawyer claims the tests on the 'A' and 'B' urine samples did not meet World Anti-Doping Agency criteria.
The USADA review board are expected to make a recommendation on the case within the week.
The USADA, based on the board's recommendation, will then decide whether to charge Landis with a doping offence.
The levels of testosterone found in Landis were more than twice the legal limit after stage 17.
Landis' lawyer Howard Jacobs said in a statement: "The single testosterone/epitestosterone analysis in this case is replete with fundamental, gross errors."
I look forward to restoring my good name
Jacobs also claims that the positive finding on the 'B' sample came from a sample number not assigned to Landis.
Landis, who has repeatedly denied taking performance-enhancing drugs, produced a stunning display on the stage 17 ride to Morzine after struggling on the final climb the day before.
There have been various reasons given for the failed test: dehydration, injections for pain in his hip, natural metabolism or that he drank whisky and beer the night before the stage.
"I did not take testosterone or any other performance-enhancing substance and I'm very happy that the science is confirming my innocence," Landis said in a statement.
"I look forward to restoring my good name so that I can focus on my hip replacement and begin training for next season."
Landis, who was sacked by his Phonak team after the positive drugs test, is facing a two-year ban and the loss of his Tour de France title.