Lance Armstrong has been notified by the UCI that he has been stripped of all the titles he won after July 1998 and the American has three weeks to appeal, a spokesman for cycling's world governing body said on Monday.

"Lance Armstrong's lawyer was notified on 6th December that all his results since 1st August 1998 were nullified. He has 21 days to appeal (from that date)," the International Cycling Union's Enrico Carpani said.

The 41-year-old Armstrong had his seven Tour de France victories scratched from the records in October after the UCI ratified the USADA sanctions against him.