Dwain Chambers's hopes of resurrecting his athletics career were yesterday countered by a damning indictment from one of the sport's most influential figures. Lord Coe, a vice-president of the IAAF and chairman of the London Organising Committee of the Olympic Games, said that Chambers's tell-all confession to UK Sport should not open a way back for the disgraced sprinter.

Chambers has declared his intention to compete for a place at the Olympics in August, which would entail a legal challenge to his British Olympic Association life ban, but Coe believes that the likes of the 30-year-old have wrecked the sport's credibility. “The way we move away from it [the drugs issue] is we have got to get these people out of our sport,” he said. “I don't recognise a particularly principled stand in the last few days. What I do recognise is somebody trying desperately to get back into a sport that he has done massive damage to. This stance is only going to cause more damage.

“I'm delighted that Dwain made himself available to UK Sport, but if you're saying ‘does that lead to redemption?' it may well do, but not in our sport, which has already suffered a horrendous period.”

Chambers, who won a silver medal in the 60metres at the World Indoor Championships in March, completed a two-year ban for doping in 2005. On Friday, he revealed to John Scott, of Drug Free Sport, UK Sport's anti-doping arm, that he had taken seven different drugs. He also handed over a detailed account of his doping programme. Scott said that he wants Chambers to name others involved in his deceit. “This is the litmus test in terms of how prepared Dwain is to co-operate with us,” he said. “I cannot believe there were not people in the system who turned a blind eye or gave him the nod to continue.”