The Sunday Times paid Armstrong $485 000 to settle a case after it printed allegations in 2004 that he took performance-enhancing drugs.
But this year, the US Anti-Doping Agency found that Armstrong led a massive doping program on his teams. Armstrong was stripped of his seven Tour de France titles and banned from cycling for life.
The Sunday Times said in its latest edition that it has issued legal papers against Armstrong "demanding a return of the settlement payment plus interest, as well as its costs in defending the case."
The paper says the claim "is likely to exceed" $1.6-million. - Sapa-AP