Hitting out ... seven-time Tour de France winner Lance Armstrong.

Hitting out ... seven-time Tour de France winner Lance Armstrong. Photo: Reuters

Lance Armstrong has again hit out against his anti-doping charges after an unconfirmed report alleged five former teammates had testified against him.

One of the Americans said to have admitted to doping and given evidence to a US Anti-Doping Agency (USADA) investigation is George Hincapie, a key lieutenant at BMC for defending Tour de France champion Cadel Evans.

Hincapie was the only rider to support Armstrong through all his record seven Tour de France wins from 1999-2005.

"So let me get this straight...come in and tell usantidoping exactly what they wanted to hear in exchange for immunity, anonymity, and the opportunity to continue to race the biggest event in cycling," Armstrong said on Twitter.

"This isn't about usantidoping wanting to clean up cycling - rather it's just plain ol' selective prosecution that reeks of vendetta."

In a front-page report on Thursday, Dutch newspaper De Telegraaf named Hincapie, Garmin-Sharp riders Christian Vande Velde and Dave Zabriskie, their team boss Jonathan Vaughters and Levi Leipheimer of Omega Pharma-Quick Step.

All are at the Tour de France.

There had been speculation about the four current riders when they all mysteriously withdrew their availability for the US Olympic road team a few days before the Tour.

USADA have said they have testimony from 10 former team colleagues of Armstrong, but have not revealed their identities.

Speaking before stage five at the Tour, Hincapie did not confirm or deny he had given evidence against Armstrong, his long-time friend.

But Hincapie said he felt for Armstrong.

"I haven't [spoken to Armstrong] in a while - I feel bad he's going through all this, Lance has done so many things for the sport," Hincapie said.

"His accomplishments are incredible, what he's achieved in the sport of cycling, the attention he's brought to the sport of cycling.

"What he's done for the cancer society is honourable "

The Dutch media report also alleged Hincapie, Zabriskie, Vande Velde and Leipheimer had received six-month bans that they can start serving at the end of the year.

But Garmin-Sharp and Vaughters denied they had any knowledge of such a ban.

AAP