Armstrong ignores deadline to cooperate with Usada

(REUTERS) - The United States Anti-Doping Agency (Usada) will push ahead with efforts to clean up cycling without help from Lance Armstrong after the disgraced cyclist rejected another deadline to meet anti-doping investigators by Wednesday.

Armstrong's lawyer Tim Herman said in a statement published in USA Today that the former cyclist still had "issues" with Usada, who had exposed him as drug cheat and led to him being stripped of his seven Tour de France titles.

In a two-part television interview with Oprah Winfrey last month, Armstrong admitted to using performance-enhancing drugs throughout his career.

Following his admission, Usada offered Armstrong an opportunity to come forward and tell what he knows about doping in cycling and provide details about how he cheated and was able to avoid detection.