LOS ANGELES: A federal judge Monday dismissed Lance Armstrong's lawsuit against the US Anti-Doping Agency, opening the way for the agency's drug case against the seven-time Tour de France winner to proceed.

US District Judge Sam Sparks noted "troubling aspects" of USADA's case against Armstrong and a "perplexing" battle between USADA and the International Cycling Union over jurisdiction in the case, but despite his criticism of those bodies he was firm in his view that the US courts were not the place to decide the issue.

Armstrong, who has vehemently denied doping during his cycling career, had argued USADA lacked jurisdiction to pursue a case against him and claimed the agency's arbitration process violated his rights under the US constitution.

A 2010 file photo of Armstrong during the second stage of the Tour de Suisse cycling race, near Ascona, Switzerland. - EPA

Sparks dismissed the lawsuit, filed in Armstrong's hometown of Austin, Texas. Armstrong can appeal to a higher court, move on to arbitration with USADA - and perhaps eventually to the Court of Arbitration for Sport - or accept sanctions from the agency, which has charged Armstrong with doping during the years he won his Tour de France titles from 1999-2005.

Penalties could include a lifetime ban from cycling and the loss of his Tour de France titles.

"We are pleased that the federal court in Austin, Texas, has dismissed Lance Armstrong's lawsuit and upheld the established rules which provide Congressionally-mandated due process for all athletes," USADA chief executive Travis Tygart said in a statement.

"The rules in place have protected the rights of athletes for over a decade in every case USADA has adjudicated and we look forward to a timely, public arbitration hearing in this case, should Mr. Armstrong choose, where the evidence can be presented, witness testimony will be given under oath and subject to cross examination, and an independent panel of arbitrators will determine the outcome of the case."

Armstrong has called USADA's pursuit of the case a "vendetta" and his attorney Tim Herman welcomed Sparks' comment calling USADA's motives "mystifying".

"UCI has asserted that it has exclusive authority to decide whether charges should be brought in this case and has directed USADA not to proceed further," Herman said in a statement.

"We are reviewing the court's lengthy opinion and considering Mr. Armstrong's options at this point."

Sparks found Armstrong's claim that USADA's procedures denied him his constitutional right to due process was "without merit".

Otherwise, the judge said, the matter would be "best resolved through the well-established system of international arbitration, by those with expertise in the field, rather than by the unilateral edict of a single nation's courts."

"This court declines to assume either the pool of potential arbitrators, or the ultimate arbitral panel itself, will be unwilling or unable to render a conscientious decision based on the evidence before it," Sparks wrote. "Further, Armstrong has ample appellate avenues open to him."

Sparks did note "the deficiency" of USADA's charging document, but said the agency's lawyers had informed the court that Armstrong would receive more detailed disclosures relating to USADA's charges against him "at a time reasonably before arbitration."

Sparks also noted "troubling aspects" of the case, "not least of which is USADA's apparent single-minded determination to force Armstrong to arbitrate the charges against him, in direct conflict with UCI's equally evident desire not to proceed against him."

"Unfortunately, the appearance of conflict on the part of both organizations creates doubt the charges against Armstrong would receive fair consideration in either forum," Sparks said, but added that made it more important for the matter to be resolved by the parties involved - also including the US cycling federation.

"As mystifying as USADA's election to proceed at this date and in this manner may be, it is equally perplexing that these three national and international bodies are apparently unable to work together to accomplish their shared goal - the regulation and promotion of cycling," Sparks wrote.

"However, if these bodies wish to damage the image of their sport through bitter infighting, they will have to do so without the involvement of the United States courts." - AFP

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