"I will make myself available anytime and anywhere to meet with the investigators in this case," Armstrong said in a statement issued on Friday.
"They are also welcome to review my long history of tests for performance-enhancing drugs, which I have never failed," Armstrong added.
"I am confident my name will be cleared, and I look forward to racing in France for years to come."
Lance Armstrong has been dogged by doping allegations throughout his cycling career. (CP Photo)
On Thursday, French authorities confirmed they'd opened a preliminary investigation into Armstrong. The impetus for the probe is comments made by Emma O'Reilly, Armstrong's former assistant.
In the French-language book, L.A. Confidential, the Secrets of Lance Armstrong, O'Reilly claims the American cyclist had her dispose of used syringes. O'Reilly also said Armstrong borrowed makeup to cover up needle marks on his arms.
Armstrong has scoffed at the book's claims as "absolutely untrue" and denies ever taking performance-enhancing drugs. Armstrong has only tested positive once in his career – for a cortisone-based cream in 1999.
"Let me make one thing emphatically clear: I believe in clean and fair competition," Armstrong statement read. "As I have said before, I do not use and have never used performance-enhancing drugs."
Last July, a Paris appeals court turned down Armstrong's request that the book, written by journalists David Walsh and Pierre Ballester, should include his denial of the allegations.
Armstrong has been dogged by suggestions that he's used performance-enhancing substances since 1999, when he made a miraculous recovery from testicular cancer to win his first Tour de France.
Armstrong has also been connected with notorious Italian sports doctor Michele Ferrari, whose name has been linked to the endurance-boosting drug EPO.
Armstrong still hasn't announced if he'll compete in this year's Tour de France.
