The convicted sports-doping doctor Eufemiano Fuentes is threatening to reveal the dirty secrets of the world's major sporting events as he offers to sell his story to newspapers after being convicted on public health charges in Spain for his role in helping top cyclists to cheat.

Fuentes, considered one of international sport's leading dope doctors, has sent out a list of subjects that – for a price – he is now prepared to talk publicly about. It includes Spanish Champions League football teams, London marathon winners, Olympic medallists and a long list of cyclists he was involved with.

He has also offered to reveal how Tour de France officials failed to detect doping even when they tested those who had been taking performance-enhancing substances.

"How I prepared a team to play in the Champions League," is one category of revelations he is offering, according to an email sent by his lawyers on Friday.

That alone threatens to widen the scandal surrounding his doping activities to football, a sport in which Spain currently leads the world as European champions and World Cup holders.

One witness at his trial in Madrid, the former cyclist Jesus Manzano, said he had seen Spanish and Brazilian soccer players at Fuentes' clinic.

Fuentes is also believed to have worked with Real Sociedad, a first division club who finished second in the Spanish league and played in the Champions League while he was involved with them.

The Spanish doctor, who is expected to appeal against his suspended one year sentence, has previously admitted that his clients included footballers, as well as cyclists, track athletes and boxers – though he has largely refused to name them.

Just how much more detail he is now prepared to reveal remains a mystery.

"He has received approaches from several media organisations, offering money," his lawyer Joseé Miguel Lledó explained. "This is a list of subjects he can talk about, but he won't do that until appeals have been lodged later in May."

"My medical relationship with the winners of the Tour of France, the Giro of Italy and the Vuelta of Spain," is a further category of revelations he is offering.

Another is: "My medical relationship with winners of the London marathon... including pre-race treatments." It is not clear who he was talking about, though Spaniard Abel Anton won the race in 1998. Anton is now a senator for the ruling People's party along with Marta Dominguez, a world champion middle distance runner who shook off doping allegations after being arrested in 2010.

Trial evidence showed that Fuentes's dealings with cyclists routinely included blood auto-transfusions to increase red blood counts and the use of EPO and other substances that are now banned.

He also offers to reveal the keys to Spain's eruption on to the Olympic medal table, with its record haul at the 1992 Barcelona Games, described as the result of a mysterious process that he calls going "from tolerance to success". His offer to talk about the Olympic team comes as Spain waits to hear whether Madrid will be chosen to host the 2020 Games.

Fuentes also appears to be preparing to take revenge on those cyclists who gave evidence against him by telling, among other things, how blood transplants were carried out secretly in hotel rooms during major races.

He names Olympic-medal winning US cyclist Tyler Hamilton – who has already admitted doping and gave evidence at Fuentes' trial by video link – along with the Tour de France winner Jan Ullrich, two-times Italian Giro winner Ivan Basso, Spain's triple Vuelta winner Roberto Heras, who has denied receiving blood transfusions from Fuentes, and German Jörg Jaksche.