Disgraced cyclist Lance Armstrong could face courtroom oath challenge

Lance Armstrong could be forced to testify under oath about his doping after a US insurance firm filed a lawsuit demanding the disgraced US cyclist return US$12 million in bonus money payments.

Texas-based SCA Promotions paid bonus money to Armstrong - who last month admitted being a dope cheat after years of denials - for his Tour de France triumphs after insuring his victories and wants him to repay it as he was stripped of his record seven Tour titles last year.

"It is time now for Mr Armstrong to face the consequences of his actions. This includes returning all of the funds paid to him by SCA, which totals more than US$12 million," the lawsuit said.

"Mr Armstrong has no legal right to retain any prize money paid to him by SCA because he is not the official winner of any Tour de France titles."

The 35-page state court filing in Dallas would deliver a financial blow as well as put Armstrong under oath about the scandal that ruined his cancer-comeback story and tainted his Livestrong Foundation charity work.

"Lance Armstrong perpetuated what may well be the most outrageous, cold-hearted and elaborate lie in the history of sports," the law suit said.