Shocked Gatlin sacks coach after doping claim

World 100 metres champion Justin Gatlin said on Tuesday he was shocked and surprised at doping allegations made against his coach Dennis Mitchell, like Gatlin a convicted doper, but added that he had sacked him as soon as he heard about the issue. Britain's Daily Telegraph set up a sting where they claim Mitchell, the American former medal-winning sprinter who was previously banned for doping, and sports agent Robert Wagner had offered to supply performance-enhancing drugs to undercover reporters claiming to be making a movie featuring a doped athlete. Gatlin, 35, who won the world title in London this year against a backdrop of jeering relating to his two doping bans, issued a statement via Instagram where he said: "I am not using and have not used PEDs (performance-enhancing drugs.)

Anti-doping officials have launched an investigation into what IAAF president Lord Coe called "serious allegations" about world champion sprinter Justin Gatlin's coach and an agent.https://t.co/ZnuoW792Qh pic.twitter.com/CKqKbKz2jp

— BBC Sport (@BBCSport) December 19, 2017

"I was shocked and surprised to learn that my coach would have anything to do with even the appearance of these current accusations. I fired him as soon as I found out about this. "All legal options are on the table as I will not allow others to lie about me like this." The Athletics Integrity Unit and the US Anti-Doping Agency (USADA) have both said they are investigating the claims.

Gatlin and his coach are being investigated by sports and doping authorities after members of his team offered to illicitly supply performance-enhancing drugshttps://t.co/of1QD3I0Zb pic.twitter.com/BBoFVMUWuZ

— The Telegraph (@Telegraph) December 18, 2017

USADA said in a statement: "Investigations stemming from tips and whistleblowers play a critical role in anti-doping efforts. We are presently co-ordinating with the Athletics Integrity Unit in order to investigate these claims fully." The International Olympic Committee said on Tuesday: "The IOC has full confidence that WADA will look very carefully into this matter." The Telegraph quoted International Association of Athletics Federations president Seb Coe as saying: "These allegations are extremely serious and I know the independent Athletics Integrity Unit will investigate in accordance with its mandate."

Gatlin has responded by sacking his coachhttps://t.co/s36qL7ucUt

— SportsJOE (@SportsJOE_UK) December 18, 2017

In a statement to the Telegraph, Mitchell, who confessed on oath to using banned substances during his career, said: "I never suggested in any way that any of my current athletes used any banned substances or that I was familiar with training any of my current athletes with those substances." Wagner also denied being involved in doping but said he "played along" in the sting because he knew what was going on. Gatlin has been a divisive figure in the sport throughout his career, which brought him Olympic 100m gold in 2004 and a host of other global medals.

Justin Gatlin says he is "shocked and surprised" at doping allegations made against his coach and agent. More: https://t.co/E5luvUNc4Q pic.twitter.com/kzKYpoudiO

— BBC Sport (@BBCSport) December 19, 2017

He served two doping bans for offences he has always denied and after his second comeback, was widely painted by the media as the bad guy going up against the sport's darling, Usain Bolt. In August, in Bolt's final individual championship race, Gatlin took the 100m gold at the World Championships in London, with the Jamaican finishing third.